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ACI Worldwide Inc To Release First Quarter 2010 Financial Results

(NEW YORK — April 15, 2010) — 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 April 29, 2010 at 8:30 am EDT to discuss the first quarter 2010 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: (866) 914-7436, International/Local: (817) 385-9117. Please provide your name, the conference name ACI Worldwide, Inc. and conference code 69777163.

There will be a 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 69777163.

About ACI Worldwide

ACI Worldwide is a leading provider of software and services solutions to initiate, manage, secure and operate electronic payments for major banks, retailers and processors around the world. ACI Agile Payments Solution offers a vision for the future for financial institutions of an integrated solution that can meet all their payment needs – from a single service to a complete toolset. Today, ACI products deliver payment processing, online banking, fraud prevention and detection, and back-office services. ACI solutions provide agility, reliability, manageability and scale to customers around the world. Visit ACI Worldwide at www.aciworldwide.com.