(NEW YORK — April 22, 2009) —   ACI Worldwide, Inc. (Nasdaq: ACIW), a leading international provider of electronic payments software and solutions, today announced that it will hold a conference call on May 6, 2009 at 8:30 am EDT to discuss the first quarter 2009 financial results.  Interested persons may access a real-time audio broadcast of the teleconference at http://www.aciworldwide.com or use the following numbers for dial in participation:  US/Canada: (866) 362-7879, International/Local:  (706) 634-2207.   Please provide your name, the conference name ACI Worldwide, Inc. and conference code 96839292.

There will be an encore replay available for two weeks on (800) 642-1687 for US/Canada Dial-In and (706) 645- 9291 for International Dial-In participants. Conference code 96839292.