POWER OF ATTORNEY
Know all by these presents that the undersigned hereby constitutes and appoints
each of Rasmani Bhattacharya, Lindsay Germano, Aisha Qureshi, Stacey Langley,
and Alyssa Gubics, signing singly, as the undersigned's true and lawful
attorney-in-fact to: (1) execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer and/or director of CSG Systems
International, Inc. (the "Company"), Forms 3, 4 and 5 (including amendments
thereto) in accordance with Section 16(a) of the Securities Exchange Act of
1934 and the rules and regulations thereunder and a Form ID, Uniform Application
for Access Codes to File on Edgar;
(2) do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such
Forms 3, 4 or 5 or Form ID and timely file such forms (including
amendments thereto) and application with the United States Securities and
Exchange Commission and any stock exchange or similar authority; and
(3) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit
to, in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf
of the undersigned pursuant to this Power of Attorney shall be in such
form and shall contain such terms and conditions as such attorney-in-fact
may approve in such attorney-in-fact's discretion.
The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might
or could do if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that such attorney-in-fact, or
such attorney-in-fact's substitute or substitutes, shall lawfully do or cause
to be done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorneys-infact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to
comply with Section 16 of the Securities Exchange Act of 1934. The undersigned
agrees that each such attorney-in-fact herein may rely entirely on information
furnished orally or in writing by the undersigned to such attorney-in-fact. The
undersigned also agrees to indemnify and hold harmless the Company and each
such attorney-in-fact against any losses, claims, damages or liabilities (or
actions in these respects) that arise out of or are based upon any untrue
statements or omission of necessary facts in the information provided by the
undersigned to such attorney-in fact for purposes of executing, acknowledging,
delivering or filing Forms 3, 4 or 5 (including amendments thereto) or Form ID
and agrees to reimburse the Company and such attorney-in-fact for any legal or
other expenses reasonably incurred in connection with investigating or
defending against any such loss, claim, damage, liability or action. This Power
of Attorney supersedes any power of attorney previously executed by the
undersigned regarding the purposes outlined in the first paragraph hereof
("Prior Powers of Attorney"), and the authority of the attorneys-in-fact named
in any Prior Powers of Attorney is hereby revoked. This Power of Attorney shall
remain in full force and effect until the undersigned is no longer required to
file Forms 3, 4 or 5 with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier (a) revoked by
the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact or (b) superseded by a new power of attorney regarding the
purposes outlined in the first paragraph hereof dated as of a later date. IN
WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
effective as of the 15th day of May, 2023. /s/ Eric Carrasquilla Name: Eric
Carrasquilla