ACI Becomes IBM ISV Advantage Member.

ACI Eyes Program's Product Development Benefits to Enhance Payments Software

OMAHA, Neb. -- ACI Worldwide (NASDAQ:TSAI), a leading international provider of software for electronic payment systems, today announced that the company has joined IBM's ISV Advantage for Industries program. The program is designed to provide members with technical and marketing support to help meet the specific needs of their customers. ACI software products running on IBM platforms such as BASE24-es([R]), ACI Payments Manager([TM]), ACI Wholesale Payments System([TM]) and others will leverage the program to provide extended benefits to ACI customers.

As a member of the ISV Advantage program, ACI will tap the program's comprehensive technical, marketing and sales support to enhance its industry leading software solutions running on various IBM platforms.

"The combination of ACI applications with IBM's middleware will continue to offer ACI customers industry leading solutions that are reliable and cost effective," said June Felix, general manager IBM Banking Solutions. "IBM is committed to helping ISV members quickly respond to changing market opportunities and we look forward to further collaboration with ACI."

"Membership in the IBM ISV Advantage program creates efficiencies in product development that will ultimately help ACI deliver solutions to the market more quickly," said Jeff Hale, chief marketing officer, ACI Worldwide. "This enhanced partnership will further ACI's mission to provide best-of-breed payments solutions designed to meet specific customer needs."

About ACI Worldwide

Every second of every day, ACI solutions are at work processing electronic payments, managing risk, automating back office systems and providing application infrastructure services. Founded in 1975, ACI is a leading international provider of solutions for consumer and wholesale banking, retail and cross-industry systems. ACI serves more than 800 customers in 83 countries including many of the world's largest financial institutions, retailers and payment processors. Visit ACI Worldwide on the Internet at www.aciworldwide.com.

Any statements in this press release regarding projected results are preliminary and "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. In addition, this press release may contain other forward-looking statements including statements regarding Transaction Systems Architects, Inc.'s ("TSA"), its subsidiaries or third parties' expectations, predictions, views, opportunities, plans, strategies, beliefs, and statements of similar effect. The forward-looking statements in this press release are subject to a variety of risks and uncertainties. Actual results could differ materially.

For a detailed discussion of these and other risk factors, interested parties should review the Company's filings with the Securities and Exchange Commission, including the Company's Form 10-K filed on December 14, 2005, the Company's Form 10Q filed on February 9, 2006, the Company's Form 10Q filed on May 10, 2006, and the Company's Form 10Q filed on August 9, 2006.