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<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-right:3.52%;font-weight:bold;font-size:9pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;text-indent:7.04%;">As filed with the Securities and Exchange Commission on August 21, 2020</p>
<p style="text-align:right;margin-top:0pt;margin-bottom:0pt;margin-right:3.52%;font-weight:bold;font-size:9pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;text-indent:7.04%;"><font style="margin-left:36pt;"></font><font style="margin-left:36pt;">Registration No. 333-</font></p>
<p style="text-align:center;margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-weight:bold;;font-size:8pt;">&nbsp;</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:11pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">UNITED STATES</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:11pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">SECURITIES AND EXCHANGE COMMISSION</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:11pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">Washington, D.C. 20549</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:9pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">______________________</p>
<p style="margin-top:6pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:12pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">FORM S-8</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-family:Times New Roman;font-size:7pt;font-weight:bold;">&nbsp;</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:9pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">REGISTRATION STATEMENT UNDER THE</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:9pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">SECURITIES ACT OF 1933</p>
<p style="margin-bottom:6pt;margin-top:0pt;text-align:center;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:9pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">______________________</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:18pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">CSG SYSTEMS INTERNATIONAL, INC.<br /><font style="font-weight:normal;font-style:italic;font-size:8pt;">(Exact name of registrant as specified in its charter)</font><font style="font-style:italic;font-size:8pt;"><br /></font></p>
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<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Delaware</p></td>
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<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">47-0783182</p></td>
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<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-style:italic;font-size:8pt;font-family:Times New Roman;font-weight:normal;text-transform:none;font-variant: normal;">(State or other jurisdiction of</p>
<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-style:italic;font-size:8pt;font-family:Times New Roman;font-weight:normal;text-transform:none;font-variant: normal;">incorporation or organization)</p></td>
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<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-style:italic;font-size:8pt;font-family:Times New Roman;font-weight:normal;text-transform:none;font-variant: normal;">(I.R.S. Employer</p>
<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-style:italic;font-size:8pt;font-family:Times New Roman;font-weight:normal;text-transform:none;font-variant: normal;">Identification No.)</p></td>
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<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-family:Times New Roman;font-size:8pt;font-weight:bold;">&nbsp;</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">6175 S. Willow Drive, 10th Floor</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">Greenwood Village, Colorado 80111<br /><font style="font-weight:normal;font-style:italic;">(Address of principal executive offices, including zip code)</font></p>
<p style="margin-top:6pt;text-align:center;margin-bottom:0pt;margin-left:3.52%;margin-right:3.52%;text-indent:0%;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">CSG Systems International, Inc. Amended and Restated 2005 Stock Incentive Plan<br /><font style="font-weight:normal;font-style:italic;font-size:8pt;">(Full title of the plan)</font></p>
<p style="margin-top:4pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">Gregory L. Cannon</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">Senior Vice President, General Counsel and Secretary</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">CSG Systems International, Inc.</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">6175 S. Willow Drive, 10th Floor</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">Greenwood Village, Colorado 80111</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">(303) 200-2000</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-weight:normal;font-style:italic;font-size:8pt;font-family:Times New Roman;text-transform:none;font-variant: normal;">(Name, address and telephone number, including area code, of agent for service)</p>
<p style="margin-bottom:5pt;margin-top:0pt;text-align:center;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">______________________<br /><font style="font-size:9pt;">Copy to:</font></p>
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<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Ned <font style="text-transform:uppercase;">A. </font>Prusse</p>
<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Perkins Coie LLP</p>
<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">1900 Sixteenth Street, Suite 1400</p>
<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Denver, Colorado 80202</p>
<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(303) 291-2300</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.&nbsp;&nbsp;See the definitions of &#8220;large accelerated filer,&#8221; &#8220;accelerated filer,&#8221; &#8220;smaller reporting company,&#8221; and &#8220;emerging growth company&#8221; in Rule&#160;12b-2 of the Exchange Act: <font style="margin-left:36pt;"></font></p>
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<p style="margin-top:4pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Large accelerated filer</p></td>
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<p style="margin-top:4pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"><font style="font-size:8pt;font-family:'Times New Roman'">&#9746;</font></p></td>
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<p style="margin-top:4pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:8pt;">&nbsp;</p></td>
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<p style="margin-top:4pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Accelerated filer</p></td>
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<p style="margin-top:4pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"><font style="font-size:8pt;font-family:'Times New Roman'">&#9744;</font></p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Non-accelerated filer</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"><font style="font-size:8pt;font-family:'Times New Roman'">&#9744;</font></p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:8pt;">&nbsp;</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Smaller reporting company</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"><font style="font-size:8pt;font-family:'Times New Roman'">&#9744;</font></p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Do not check if a smaller reporting company)</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Emerging growth company</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-size:8pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"><font style="font-size:8pt;font-family:'Times New Roman'">&#9744;</font></p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:8pt;">&nbsp;</p>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.&nbsp;&nbsp;<font style="font-family:'Times New Roman';"><font style="font-size:8pt;font-family:'Times New Roman'">&#9744;</font></font></p>
<p style="margin-top:6pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-size:9pt;font-family:Times New Roman;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;">CALCULATION OF REGISTRATION FEE</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-family:Times New Roman;font-size:5pt;font-weight:bold;">&nbsp;</p>
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<td valign="bottom"  style=" border-top:double 2.5pt #000000; border-bottom:solid 0.75pt #000000; border-left:solid 0.75pt #000000; border-right:solid 0.75pt #000000;">
<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Title of Securities to Be Registered</p></td>
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<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Amount to Be Registered<sup style="font-size:85%;line-height:120%;vertical-align:top">(1)</sup></p></td>
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<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Proposed Maximum Offering Price Per Share<sup style="font-size:85%;line-height:120%;vertical-align:top">(2)</sup></p></td>
<td valign="bottom"  style=" border-top:double 2.5pt #000000; border-bottom:solid 0.75pt #000000; border-left:solid 0.75pt #000000; border-right:solid 0.75pt #000000;">
<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Proposed Maximum Aggregate Offering Price<sup style="font-size:85%;line-height:120%;vertical-align:top">(2)</sup></p></td>
<td valign="bottom"  style=" border-top:double 2.5pt #000000; border-bottom:solid 0.75pt #000000; border-left:solid 0.75pt #000000; border-right:solid 0.75pt #000000;">
<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Amount of Registration Fee<sup style="font-size:85%;line-height:120%;vertical-align:top">(2)</sup></p></td>
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<td valign="middle"  style=" border-top:solid 0.75pt #000000; border-bottom:solid 0.75pt #000000; border-left:solid 0.75pt #000000; border-right:solid 0.75pt #000000;">
<p style="margin-bottom:3pt;margin-top:3pt;margin-left:0pt;;text-indent:0pt;;font-size:9pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Common Stock, $0.01 par value</p></td>
<td valign="middle"  style="padding-left:5.75pt;padding-Right:8.3pt; border-top:solid 0.75pt #000000; border-bottom:solid 0.75pt #000000; border-left:solid 0.75pt #000000; border-right:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:3pt;margin-top:3pt;margin-left:0pt;;margin-right:0.39%;text-indent:0pt;;font-size:9pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">3,600,000</p></td>
<td valign="middle"  style=" border-top:solid 0.75pt #000000; border-bottom:solid 0.75pt #000000; border-left:solid 0.75pt #000000; border-right:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:3pt;margin-top:3pt;margin-left:0pt;;text-indent:0pt;;font-size:9pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">$44.59</p></td>
<td valign="middle"  style="padding-left:5.75pt;padding-Right:10.8pt; border-top:solid 0.75pt #000000; border-bottom:solid 0.75pt #000000; border-left:solid 0.75pt #000000; border-right:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:3pt;margin-top:3pt;margin-left:0pt;;text-indent:0pt;;font-size:9pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">$160,524,000</p></td>
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<p style="text-align:center;margin-bottom:3pt;margin-top:3pt;margin-left:0pt;;text-indent:0pt;;font-size:9pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">$20,836.02</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:10.56%;margin-right:5.28%;text-indent:-3.52%;font-family:Times New Roman;font-size:5pt;">&nbsp;</p>
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<p style="margin-top:0pt;margin-bottom:0pt;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(1)</font></p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:8pt;"><font style="Background-color:#FFFFFF;color:#000000;">Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the &#8220;Securities Act&#8221;), this registration statement also covers any additional shares of the registrant&#8217;s common stock that may become issuable under the </font>CSG Systems International, Inc. Amended and Restated 2005 Stock Incentive Plan<font style="Background-color:#FFFFFF;color:#000000;"> as a result of any future stock splits, stock dividends or similar adjustments of the registrant&#8217;s outstanding common stock.</font></p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:8pt;">&nbsp;</p></td></tr></table></div>
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<p style="margin-top:6pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:8pt;">&nbsp;</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(2)</font></p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:8pt;">Estimated solely for the purpose of calculating the registration fee pursuant to Rule&#160;457(c) and Rule 457(h) under the Securities Act. The proposed maximum offering price per share is estimated based on the average of the high and low sales prices for the registrant&#8217;s common stock as reported by the Nasdaq Global Select Market on August 17, 2020. </p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:8pt;">&nbsp;</p></td></tr></table></div>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-family:Times New Roman;font-weight:bold;">&nbsp;</p>
<p style="margin-top:12pt;margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:CG Times (WN);font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&nbsp;</p>
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<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><a name="_AEIOULastRenderedPageBreakAEIOU2"></a><font style="font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">EXPLANATORY NOTE</font></p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-family:Times New Roman;font-weight:bold;">&nbsp;</p>
<p style="text-align:left;margin-top:0pt;margin-bottom:0pt;margin-right:0.39%;text-indent:0%;font-weight:normal;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">This registration statement on Form S-8 is filed by CSG Systems International, Inc. relating to 3,600,000 additional shares of common stock, par value $0.01 per share, authorized to be issued pursuant to the CSG Systems International, Inc. Amended and Restated 2005 Stock Incentive Plan.</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-family:Times New Roman;font-weight:bold;">&nbsp;</p>
<p style="margin-top:0pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">PART II</p>
<p style="margin-top:6pt;text-align:center;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:0%;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">INFORMATION REQUIRED IN REGISTRATION STATEMENT</p>
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<p style="margin-top:12pt;margin-bottom:0pt;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Item 3.</font></p></td>
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<p style="margin-top:12pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">Incorporation of Documents by Reference.</p></td>
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<p style="margin-top:12pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td></tr></table></div>
<p style="margin-top:12pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The following documents filed with the Securities and Exchange Commission (the &#8220;SEC&#8221;) are hereby incorporated by reference in this registration statement:</p>
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<p style="margin-top:6pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(a)</font></p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">The registrant&#8217;s <a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020005691/csgs-10k_20191231.htm"><font style="text-decoration:underline;">Annual Report on Form 10-K for the fiscal year ended December&#160;31, 2019</font></a><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">, filed with the SEC on February 21, 2020;</font></p></td></tr></table></div>
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<p style="margin-top:6pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(b)</font></p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">The registrant&#8217;s Quarterly Reports on Form 10-Q for the quarters ended <a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020022554/csgs-10q_20200331.htm"><font style="text-decoration:underline;">March 31, 2020</font></a><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"> and </font><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020022554/csgs-10q_20200331.htm"><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020037446/csgs-10q_20200630.htm"><font style="text-decoration:underline;">June 30, 2020</font></a><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">, filed with the SEC on May 7, 2020 and August 6, 2020, respectively;</font></p></td></tr></table></div>
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<p style="margin-top:6pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(c)</font></p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">The registrant&#8217;s Current Reports on Form 8-K filed with the SEC on <a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020001089/csgs-8k_20200110.htm"><font style="text-decoration:underline;">January 14, 2020</font></a><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">, </font><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020001089/csgs-8k_20200110.htm"><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020026071/csgs-8k_20200518.htm"><font style="text-decoration:underline;">May 19, 2020</font></a><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">, </font><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020001089/csgs-8k_20200110.htm"><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020026071/csgs-8k_20200518.htm"><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020026673/csgs-8k_20200521.htm"><font style="text-decoration:underline;">May 22, 2020</font></a><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">, and </font><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020001089/csgs-8k_20200110.htm"><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020026071/csgs-8k_20200518.htm"><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020026673/csgs-8k_20200521.htm"><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000156459020027499/csgs-8ka_20200518.htm"><font style="text-decoration:underline;">May 29, 2020</font></a><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">;</font></p></td></tr></table></div>
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<p style="margin-top:6pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(d)</font></p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">The description of the registrant&#8217;s common stock contained in the registrant&#8217;s Registration Statement on Form 8-A dated January 11, 1996 under Section 12(b) of the Securities Exchange Act of 1934, as amended (the &#8220;Exchange Act&#8221;), including any amendments or reports filed for the purpose of updating such description (including <a href="http://www.sec.gov/Archives/edgar/data/1005757/000156459020005691/csgs-ex490_358.htm"><font style="text-decoration:underline;">Exhibit 4.90</font></a><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"> to the registrant&#8217;s Annual Report on Form 10-K for the fiscal year ended December&#160;31, 2019, filed with the SEC on February 21, 2020).</font></p></td></tr></table></div>
<p style="margin-top:12pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><font style="Background-color:#FFFFFF;">All documents filed by the registrant pursuant to Section&#160;13(a), 13(c), 14 or 15(d) of the Exchange Act after the date hereof, and prior to the filing of a post-effective amendment that indicates that all the securities offered hereby have been sold or that deregisters the securities offered hereby then remaining unsold, shall also be deemed to be incorporated by reference into this registration statement and to be a part hereof from the date of filing of such documents;&#160;</font><font style="font-style:italic;Background-color:#FFFFFF;">provided, however</font><font style="Background-color:#FFFFFF;">, that documents or information deemed to have been furnished and not filed in accordance with the rules of the Commission shall not be deemed incorporated by reference in this registration statement.</font></p>
<p style="margin-top:0pt;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:-7.04%;font-family:Times New Roman;font-weight:bold;">&nbsp;</p>
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<p style="margin-top:0pt;margin-bottom:0pt;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Item 4.</font></p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">Description of Securities.</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td></tr></table></div>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:3.52%;font-family:Times New Roman;">&nbsp;</p>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Not applicable.</p>
<p style="margin-top:0pt;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:-7.04%;font-family:Times New Roman;font-weight:bold;">&nbsp;</p>
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<p style="margin-top:0pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">Interests of Named Experts and Counsel.</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td></tr></table></div>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;">&nbsp;</p>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">None.</p>
<p style="margin-top:0pt;margin-bottom:0pt;margin-left:7.04%;margin-right:7.04%;text-indent:-7.04%;font-family:Times New Roman;font-weight:bold;">&nbsp;</p>
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<p style="margin-top:0pt;margin-bottom:0pt;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Item 6.</font></p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">Indemnification of Directors and Officers.</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td></tr></table></div>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;">&nbsp;</p>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Section 145 of the Delaware General Corporation Law (the &#8220;DGCL&#8221;) authorizes a corporation to indemnify its directors, officers, employees and agents against expenses (including attorney&#8217;s fees), judgments, fines and amounts paid in settlement reasonably incurred, provided they act in good faith and in a manner reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal proceeding, had no reasonable cause to believe their conduct was unlawful, although in the case or proceedings brought by or on behalf of the corporation, such indemnification is limited to expenses and is not permitted if the individual is adjudged liable to the corporation (unless the Delaware Court of Chancery or the court in which such proceeding was brought determines otherwise in accordance with the DGCL). Section 102 of the Delaware General Corporation Law authorizes a corporation to limit or eliminate its directors&#8217; liability to the corporation or its stockholders for monetary damages for breaches of fiduciary duties, other than for (1) breaches of the duty of loyalty; (2) acts or omissions not in good faith or that involve intentional misconduct or knowing violations of law; (3) unlawful payments of dividends, stock purchases or redemptions; or (4) transactions from which a director derives an improper personal benefit. </p>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:3.52%;font-family:Times New Roman;">&nbsp;</p>
<p style="text-align:center;margin-top:12pt;margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:CG Times (WN);font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">1</a></p>
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<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a name="_AEIOULastRenderedPageBreakAEIOU3"></a><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The registrant&#8217;s bylaws provide that, to the maximum extent and in the manner permitted by the DGCL, it will indemnify each director and officer</font><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"> against all claims and expenses resulting from the fact that such person was a director, officer, agent or employee of the Registrant. </font></p>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:3.52%;font-family:Times New Roman;">&nbsp;</p>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Section 145 of the DGCL authorizes a corporation to purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation against any liability asserted against and incurred by such person in any such capacity, or arising out of such person&#8217;s status as such. The Registrant has obtained liability insurance covering its directors and officers for claims asserted against them or incurred by them in such capacity. </p>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:3.52%;font-family:Times New Roman;">&nbsp;</p>
<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">In addition, the registrant has entered into indemnification agreements with each director and executive officer to indemnify such individuals to the fullest extent permitted by law. These agreements also address certain procedural and substantive matters that are not covered, or are covered in less detail, in the registrant&#8217;s bylaws or by the DGCL.</p>
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<p style="margin-top:12pt;margin-bottom:0pt;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Item 7.</font></p></td>
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<p style="margin-top:12pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">Exemption from Registration Claimed.</p></td>
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<p style="margin-top:12pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td></tr></table></div>
<p style="margin-top:12pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Not applicable.</p>
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<p style="margin-top:12pt;margin-bottom:0pt;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Item 8.</font></p></td>
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<p style="margin-top:12pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">Exhibits.</p></td>
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<p style="margin-top:12pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td></tr></table></div>
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<p style="border-bottom:Solid 0.75pt;padding-bottom:1pt;margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Description</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">5.1</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="csgs-ex51_6.htm"><font style="text-decoration:underline;">Opinion of Perkins Coie LLP</font></a></p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">23.1</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="csgs-ex231_7.htm"><font style="text-decoration:underline;">Consent of KPMG LLP</font></a></p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">23.2</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="csgs-ex51_6.htm"><font style="text-decoration:underline;">Consent of Perkins Coie LLP (included in Exhibit 5.1)</font></a></p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">24.1</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="#Power_of_Attorney"><font style="text-decoration:underline;">Power of Attorney (see signature page)</font></a></p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">99.1</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="http://www.sec.gov/Archives/edgar/data/1005757/000156459020026673/csgs-ex1004_6.htm"><font style="text-decoration:underline;">CSG Systems International, Inc. Amended and Restated 2005 Stock Incentive Plan (incorporated by reference to Exhibit 10.04 of the registrant&#8217;s Current Report on Form 8-K filed on May 22, 2020</font></a><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">)</font></p></td>
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<p style="margin-top:12pt;margin-bottom:0pt;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><font style="font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Item 9.</font></p></td>
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<p style="margin-top:12pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">Undertakings.</p></td>
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<p style="margin-top:12pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td></tr></table></div>
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<p style="margin-top:0pt;margin-bottom:0pt;font-family:Times New Roman;font-weight:bold;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"></p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td></tr></table></div>
<p style="margin-top:0pt;margin-bottom:0pt;margin-left:3.52%;margin-right:7.04%;text-indent:-3.52%;font-weight:normal;color:#000000;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">A.&nbsp;&nbsp;The undersigned registrant hereby undertakes:</p>
<p style="Background-color:#FFFFFF;margin-top:9pt;margin-bottom:0pt;margin-left:7.04%;text-indent:0%;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:</p>
<p style="Background-color:#FFFFFF;margin-top:4pt;margin-bottom:0pt;margin-left:14.08%;text-indent:0%;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(a) To include any prospectus required by Section&#160;10(a)(3) of the Securities Act;</p>
<p style="Background-color:#FFFFFF;margin-top:9pt;margin-bottom:0pt;margin-left:14.08%;text-indent:0%;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(b) To reflect in the prospectus any facts or events arising after the effective date of this registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this registration statement; and</p>
<p style="Background-color:#FFFFFF;margin-top:9pt;margin-bottom:0pt;margin-left:14.08%;text-indent:0%;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(c) To include any material information with respect to the plan of distribution not previously disclosed in this registration statement or any material change to such information in this registration statement;</p>
<p style="Background-color:#FFFFFF;margin-top:9pt;margin-bottom:0pt;margin-left:14.08%;text-indent:0%;font-style:italic;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;text-transform:none;font-variant: normal;">provided<font style="font-style:normal;">,&#160;</font>however<font style="font-style:normal;">, that paragraphs&#160;(1)(a) and (1)(b)&#160;above do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section&#160;13 or Section&#160;15(d) of the Exchange Act that are incorporated by reference in this registration statement.</font></p>
<p style="Background-color:#FFFFFF;margin-top:9pt;margin-bottom:0pt;margin-left:7.04%;text-indent:0%;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.</p>
<p style="Background-color:#FFFFFF;margin-top:9pt;margin-bottom:0pt;margin-left:7.04%;text-indent:0%;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.</p>
<p style="Background-color:#FFFFFF;margin-top:0pt;margin-bottom:0pt;text-indent:4.79%;font-family:Times New Roman;">&nbsp;</p>
<p style="text-align:center;margin-top:12pt;margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:CG Times (WN);font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">2</a></p>
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<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="Background-color:#FFFFFF;margin-top:0pt;margin-bottom:0pt;text-indent:0%;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a name="_AEIOULastRenderedPageBreakAEIOU4"></a><font style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">B.&nbsp;&nbsp;The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant&#8217;s annual report pursuant to Section&#160;13(a) or 15(d) of the Exchange Act (and, where applicab</font><font style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">le, each filing of an employee benefit plan&#8217;s annual report pursuant to Section&#160;15(d) of the Exchange Act) that is incorporated by reference in this registration statement shall be deemed to be a new registration statement relating to the securities offere</font><font style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">d therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.</font></p>
<p style="Background-color:#FFFFFF;margin-top:0pt;margin-bottom:0pt;text-indent:4.79%;font-family:Times New Roman;">&nbsp;</p>
<p style="Background-color:#FFFFFF;margin-top:0pt;margin-bottom:0pt;text-indent:0%;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">C.&nbsp;&nbsp;Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that, in the opinion of the Commission, such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.</p>
<p style="margin-top:12pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;">&nbsp;</p>
<p style="margin-top:12pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;">&nbsp;</p>
<p style="margin-top:12pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;">&nbsp;</p>
<p style="text-align:center;margin-top:12pt;margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:CG Times (WN);font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">3</a></p>
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<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="text-align:center;margin-top:12pt;margin-bottom:0pt;margin-left:6.67%;margin-right:6.67%;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><a name="_AEIOULastRenderedPageBreakAEIOU5"></a><font style="font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">SIGNATURES</font></p>
<p style="margin-top:10pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all the requirements for filing on Form&#160;S&#8209;8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Greenwood Village, State of Colorado, on August 21<font style="font-weight:bold;font-size:9pt;">, </font>2020.</p>
<p style="margin-top:6pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-weight:bold;;">&nbsp;</p>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:36pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&nbsp;</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">CSG SYSTEMS INTERNATIONAL, INC.</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:36pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&nbsp;</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:36pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&nbsp;</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:36pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&nbsp;</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">By:</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:3pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Bret C. Griess</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:36pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&nbsp;</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Name:<font style="font-weight:bold;"> </font></p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:3pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Bret C. Griess</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:36pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&nbsp;</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Title:</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:3pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">President and Chief Executive Officer</p></td>
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<p style="margin-top:0pt;margin-bottom:0pt;text-indent:0%;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="text-align:center;margin-top:0pt;margin-bottom:0pt;margin-left:6.67%;margin-right:6.67%;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><a name="Start"></a><a name="Power_of_Attorney"></a>POWER OF ATTORNEY</p>
<p style="margin-top:10pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Each person whose individual signature appears below hereby authorizes Rolland B. Johns and Gregory L. Cannon, or either of them, as attorneys-in-fact, with full power of substitution, to execute in the name and on the behalf of each person, individually and in each capacity stated below, and to file, any and all amendments to this Registration Statement, including any and all post-effective amendments.</p>
<p style="margin-top:10pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.</p>
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<p style="text-align:center;margin-top:10pt;border-bottom:Solid 0.75pt;padding-bottom:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Signature</p></td>
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<p style="margin-top:10pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-weight:bold;;">&nbsp;</p></td>
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<p style="text-align:center;margin-top:10pt;border-bottom:Solid 0.75pt;padding-bottom:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Title</p></td>
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<p style="margin-top:10pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-weight:bold;;">&nbsp;</p></td>
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<p style="text-align:center;margin-top:10pt;border-bottom:Solid 0.75pt;padding-bottom:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Date</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Bret C. Griess</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Bret C. Griess</p></td>
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<p style="margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">President, Chief Executive Officer and Director</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:12.25pt;;text-indent:-12.25pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(<font style="font-style:italic;">Principal Executive Officer</font>)</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Rolland B. Johns</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Rolland B. Johns</p></td>
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<p style="margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Executive Vice President and Chief Financial Officer</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:12.25pt;;text-indent:-12.25pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(<font style="font-style:italic;">Principal Financial Officer</font>)</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="text-align:justify;margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ David N. Schaaf</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">David N. Schaaf</p></td>
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<p style="margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Chief Accounting Officer </p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:12.25pt;;text-indent:-12.25pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(<font style="font-style:italic;">Principal Accounting Officer</font>)</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Donald B. Reed</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Donald B. Reed</p></td>
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<p style="margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Chairman of the Board</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ David G. Barnes</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">David G. Barnes</p></td>
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<p style="margin-bottom:0pt;margin-top:6pt;margin-left:12.25pt;;text-indent:-12.25pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:6pt;margin-left:12.25pt;;text-indent:-12.25pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Ronald H. Cooper</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Ronald H. Cooper</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Marwan H. Fawaz</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Marwan H. Fawaz</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Rajan Naik</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Rajan Naik</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="top" >
<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Janice I. Obuchowski</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Janice I. Obuchowski</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Frank V. Sica</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Frank V. Sica</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Haiyan Song</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Haiyan Song</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Silvio Tavares</p>
<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Silvio Tavares</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
<td valign="top" >
<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Director</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;">&nbsp;</p></td>
<td valign="top" >
<p style="text-align:center;margin-bottom:0pt;margin-top:6pt;margin-left:12pt;;text-indent:-12pt;;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">August 21,<font style="font-weight:bold;"> </font>2020</p></td>
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<p style="margin-top:0pt;border-top:Solid 0.75pt;padding-top:1pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">James A. Unruh</p></td>
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<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
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[{"type": "S-8", "sequence": "1", "filename": "csgs-s8.htm", "description": "S-8", "secsgml_size_bytes": 92716}]
{"company-data": {"conformed-name": "CSG SYSTEMS INTERNATIONAL INC", "cik": "0001005757", "assigned-sic": "7374", "irs-number": "470783182", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-248228", "film-number": "201123088"}, "business-address": {"street1": "6175 SOUTH WILLOW DRIVE", "city": "GREENWOOD VILLAGE", "state": "CO", "zip": "80111", "phone": "3037962850"}, "mail-address": {"street1": "6175 SOUTH WILLOW DRIVE", "city": "GREENWOOD VILLAGE", "state": "CO", "zip": "80111"}}
csgs-s8.htm
As filed with the Securities and Exchange Commission on August 21, 2020
Registration No. 333-
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
______________________
FORM S-8
REGISTRATION STATEMENT UNDER THE
SECURITIES ACT OF 1933
______________________
CSG SYSTEMS INTERNATIONAL, INC.
(Exact name of registrant as specified in its charter)
Delaware
47-0783182
(State or other jurisdiction of
incorporation or organization)
(I.R.S. Employer
Identification No.)
6175 S. Willow Drive, 10th Floor
Greenwood Village, Colorado 80111
(Address of principal executive offices, including zip code)
CSG Systems International, Inc. Amended and Restated 2005 Stock Incentive Plan
(Full title of the plan)
Gregory L. Cannon
Senior Vice President, General Counsel and Secretary
CSG Systems International, Inc.
6175 S. Willow Drive, 10th Floor
Greenwood Village, Colorado 80111
(303) 200-2000
(Name, address and telephone number, including area code, of agent for service)
______________________
Copy to:
Ned
A.
Prusse
Perkins Coie LLP
1900 Sixteenth Street, Suite 1400
Denver, Colorado 80202
(303) 291-2300
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.  See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act:
Large accelerated filer
☒
Accelerated filer
☐
Non-accelerated filer
☐
Smaller reporting company
☐
(Do not check if a smaller reporting company)
Emerging growth company
☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.
☐
CALCULATION OF REGISTRATION FEE
Title of Securities to Be Registered
Amount to Be Registered
(1)
Proposed Maximum Offering Price Per Share
(2)
Proposed Maximum Aggregate Offering Price
(2)
Amount of Registration Fee
(2)
Common Stock, $0.01 par value
3,600,000
$44.59
$160,524,000
$20,836.02
(1)
Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the "Securities Act"), this registration statement also covers any additional shares of the registrant's common stock that may become issuable under the
CSG Systems International, Inc. Amended and Restated 2005 Stock Incentive Plan
as a result of any future stock splits, stock dividends or similar adjustments of the registrant's outstanding common stock.
(2)
Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) and Rule 457(h) under the Securities Act. The proposed maximum offering price per share is estimated based on the average of the high and low sales prices for the registrant's common stock as reported by the Nasdaq Global Select Market on August 17, 2020.
EXPLANATORY NOTE
This registration statement on Form S-8 is filed by CSG Systems International, Inc. relating to 3,600,000 additional shares of common stock, par value $0.01 per share, authorized to be issued pursuant to the CSG Systems International, Inc. Amended and Restated 2005 Stock Incentive Plan.
PART II
INFORMATION REQUIRED IN REGISTRATION STATEMENT
Item 3.
Incorporation of Documents by Reference.
The following documents filed with the Securities and Exchange Commission (the "SEC") are hereby incorporated by reference in this registration statement:
(a)
The registrant's
Annual Report on Form 10-K for the fiscal year ended December 31, 2019
, filed with the SEC on February 21, 2020;
(b)
The registrant's Quarterly Reports on Form 10-Q for the quarters ended
March 31, 2020
and
June 30, 2020
, filed with the SEC on May 7, 2020 and August 6, 2020, respectively;
(c)
The registrant's Current Reports on Form 8-K filed with the SEC on
January 14, 2020
,
May 19, 2020
,
May 22, 2020
, and
May 29, 2020
;
(d)
The description of the registrant's common stock contained in the registrant's Registration Statement on Form 8-A dated January 11, 1996 under Section 12(b) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), including any amendments or reports filed for the purpose of updating such description (including
Exhibit 4.90
to the registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2019, filed with the SEC on February 21, 2020).
All documents filed by the registrant pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date hereof, and prior to the filing of a post-effective amendment that indicates that all the securities offered hereby have been sold or that deregisters the securities offered hereby then remaining unsold, shall also be deemed to be incorporated by reference into this registration statement and to be a part hereof from the date of filing of such documents;
provided, however
, that documents or information deemed to have been furnished and not filed in accordance with the rules of the Commission shall not be deemed incorporated by reference in this registration statement.
Item 4.
Description of Securities.
Not applicable.
Item 5.
Interests of Named Experts and Counsel.
None.
Item 6.
Indemnification of Directors and Officers.
Section 145 of the Delaware General Corporation Law (the "DGCL") authorizes a corporation to indemnify its directors, officers, employees and agents against expenses (including attorney's fees), judgments, fines and amounts paid in settlement reasonably incurred, provided they act in good faith and in a manner reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal proceeding, had no reasonable cause to believe their conduct was unlawful, although in the case or proceedings brought by or on behalf of the corporation, such indemnification is limited to expenses and is not permitted if the individual is adjudged liable to the corporation (unless the Delaware Court of Chancery or the court in which such proceeding was brought determines otherwise in accordance with the DGCL). Section 102 of the Delaware General Corporation Law authorizes a corporation to limit or eliminate its directors' liability to the corporation or its stockholders for monetary damages for breaches of fiduciary duties, other than for (1) breaches of the duty of loyalty; (2) acts or omissions not in good faith or that involve intentional misconduct or knowing violations of law; (3) unlawful payments of dividends, stock purchases or redemptions; or (4) transactions from which a director derives an improper personal benefit.
1
The registrant's bylaws provide that, to the maximum extent and in the manner permitted by the DGCL, it will indemnify each director and officer
against all claims and expenses resulting from the fact that such person was a director, officer, agent or employee of the Registrant.
Section 145 of the DGCL authorizes a corporation to purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation against any liability asserted against and incurred by such person in any such capacity, or arising out of such person's status as such. The Registrant has obtained liability insurance covering its directors and officers for claims asserted against them or incurred by them in such capacity.
In addition, the registrant has entered into indemnification agreements with each director and executive officer to indemnify such individuals to the fullest extent permitted by law. These agreements also address certain procedural and substantive matters that are not covered, or are covered in less detail, in the registrant's bylaws or by the DGCL.
Item 7.
Exemption from Registration Claimed.
Not applicable.
Item 8.
Exhibits.
Exhibit No.
Description
5.1
Opinion of Perkins Coie LLP
23.1
Consent of KPMG LLP
23.2
Consent of Perkins Coie LLP (included in Exhibit 5.1)
24.1
Power of Attorney (see signature page)
99.1
CSG Systems International, Inc. Amended and Restated 2005 Stock Incentive Plan (incorporated by reference to Exhibit 10.04 of the registrant's Current Report on Form 8-K filed on May 22, 2020
)
Item 9.
Undertakings.
A.  The undersigned registrant hereby undertakes:
(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:
(a) To include any prospectus required by Section 10(a)(3) of the Securities Act;
(b) To reflect in the prospectus any facts or events arising after the effective date of this registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this registration statement; and
(c) To include any material information with respect to the plan of distribution not previously disclosed in this registration statement or any material change to such information in this registration statement;
provided
,
however
, that paragraphs (1)(a) and (1)(b) above do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in this registration statement.
(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.
(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.
2
B.  The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant's annual report pursuant to Section 13(a) or 15(d) of the Exchange Act (and, where applicab
le, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in this registration statement shall be deemed to be a new registration statement relating to the securities offere
d therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.
C.  Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that, in the opinion of the Commission, such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.
3
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all the requirements for filing on Form S‑8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Greenwood Village, State of Colorado, on August 21
,
2020.
CSG SYSTEMS INTERNATIONAL, INC.
By:
/s/ Bret C. Griess
Name:
Bret C. Griess
Title:
President and Chief Executive Officer
POWER OF ATTORNEY
Each person whose individual signature appears below hereby authorizes Rolland B. Johns and Gregory L. Cannon, or either of them, as attorneys-in-fact, with full power of substitution, to execute in the name and on the behalf of each person, individually and in each capacity stated below, and to file, any and all amendments to this Registration Statement, including any and all post-effective amendments.
Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.
Signature
Title
Date
/s/ Bret C. Griess
Bret C. Griess
President, Chief Executive Officer and Director
(
Principal Executive Officer
)
August 21,
2020
/s/ Rolland B. Johns
Rolland B. Johns
Executive Vice President and Chief Financial Officer
(
Principal Financial Officer
)
August 21,
2020
/s/ David N. Schaaf
David N. Schaaf
Chief Accounting Officer
(
Principal Accounting Officer
)
August 21,
2020
/s/ Donald B. Reed
Donald B. Reed
Chairman of the Board
August 21,
2020
/s/ David G. Barnes
David G. Barnes
Director
August 21,
2020
/s/ Ronald H. Cooper
Ronald H. Cooper
Director
August 21,
2020
/s/ Marwan H. Fawaz
Marwan H. Fawaz
Director
August 21,
2020
/s/ Rajan Naik
Rajan Naik
Director
August 21,
2020
/s/ Janice I. Obuchowski
Janice I. Obuchowski
Director
August 21,
2020
/s/ Frank V. Sica
Frank V. Sica
Director
August 21,
2020
/s/ Haiyan Song
Haiyan Song
Director
August 21,
2020
/s/ Silvio Tavares
Silvio Tavares
Director
August 21,
2020
/s/ James A. Unruh
James A. Unruh
Director
August 21,
2020