ACI Customer Exchange Focuses on Payments Industry Direction and Product Strategies; Diverse Customer Contingent Assembles to Advance Understanding of Payments Solutions and Help Define ACI's Next Generation of Innovation.

OMAHA, Neb. -- ACI Worldwide (NASDAQ:TSAI), a leading international provider of enterprise payment solutions, today announced the opening of its annual ACI Customer Exchange (ACE) Focus Group, taking place this week in Omaha, Nebraska. The ACE Focus Group is a user-led and directed event that provides ACI customers the opportunity to discuss industry trends, share experiences and shape the direction of ACI's industry-leading software solutions. More than 100 customers from the Americas will gather to discuss and identify best practices in enterprise payments and examine important topics such as PCI data security standards and fraud management.

The highly successful ACE Focus Group provides an opportunity for ACI customers to provide feedback on product strategies and emerging technologies. This year attendees can participate in more than 40 sessions led by ACI staff, partners, and customer peers. Session topics include the strategic impact of regulation, risk management, product planning, and cross-industry solutions.

"We look forward to joining other users each year at ACI's Focus Group," said Michele Schwappach, senior technology manager, Bank of America and president, ACI Customer Exchange. "ACI customers include so many of the world's largest banks and retailers. It's an excellent opportunity to learn from fellow peers, and we know that ACI uses our feedback to shape future product plans. The end result is software solutions that help customers to be more competitive."

"We place tremendous value on the breadth and depth of feedback provided by our customers during ACE, as it helps us address issues and anticipate their needs, and consequently, improve our suite of solutions," said Tony Parkinson, president of ACI Worldwide Americas. "ACE provides an unmatched forum for sharing insights into industry trends and issues, and combined with ACI's strategic vision and product plans, helps customers best leverage their technology investment."

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, and the Company's Form 10-Q filed on February 9, 2006.