<SEC-DOCUMENT>0001564590-18-007503-index.html : 20180403
<SEC-HEADER>0001564590-18-007503.hdr.sgml : 20180403
<ACCEPTANCE-DATETIME>20180403150348
ACCESSION NUMBER:		0001564590-18-007503
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20180403
DATE AS OF CHANGE:		20180403
EFFECTIVENESS DATE:		20180403

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CSG SYSTEMS INTERNATIONAL INC
		CENTRAL INDEX KEY:			0001005757
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				470783182
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27512
		FILM NUMBER:		18732911

	BUSINESS ADDRESS:	
		STREET 1:		6175 SOUTH WILLOW DRIVE
		CITY:			GREENWOOD VILLAGE
		STATE:			CO
		ZIP:			80111
		BUSINESS PHONE:		3037962850

	MAIL ADDRESS:	
		STREET 1:		6175 SOUTH WILLOW DRIVE
		CITY:			GREENWOOD VILLAGE
		STATE:			CO
		ZIP:			80111
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>csgs-defa14a_20180517.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: csgs-defa14a_20180517.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g201804031840141152796.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g201804031840141152796.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g201804031840140742794.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g201804031840140742794.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g201804031840141342797.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g201804031840141342797.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g201804031840140952795.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g201804031840140952795.jpg

</DOCUMENT>
</SEC-DOCUMENT>