(NEW YORK — July 23, 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 August 6, 2009 at 8:30 am EDT to discuss the second quarter 2009 financial results. 

Interested persons may access a real-time audio broadcast of the teleconference at http://www.aciworldwide.com/investorrelations  or use the following numbers for dial in participation: 

• US/Canada: (800) 340-8364,
• International/Local:  (706) 634-2207.  

Please provide your name, the conference name ACI Worldwide, Inc. and conference code 21558233.

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/Local Dial-In participants.  Conference code 21558233.