ACI and FINEAC Announce French Joint Venture; ACI Demonstrates Commitment to local Market-Based Service and Support in France.

WATFORD, England -- ACI Worldwide (Nasdaq:TSAI), a leading international provider of enterprise payment solutions, and FINEAC (holding company of EAC Corporation), a leading monetique services company headquartered in France, today announced the signing of a shareholder agreement to form a joint venture under the name ACI Monetique. The new company will provide technical services and project management support to ACI customers in France including BNP Paribas, Europay France, ING Direct and Societe Generale.

ACI Monetique names Erroll Williamson as president. Williamson is currently vice president of Software and Services at ACI Worldwide EMEA. Gerald Fay, director of services for EAC Corporation, a 100 percent owned subsidiary of FINEAC, will hold the position of general manager.

"France is a key strategic market and represents one of the largest business growth opportunities for ACI Worldwide," said Williamson. "In order to effectively react to the changing requirements driven by SEPA and by structural changes in the French payment processing market, we need to proactively seek out local business partners and opportunities."

ACI Monetique, of which ACI Worldwide (France) and FINEAC will hold 51 percent and 49 percent respectively, will be based in France and benefit from the synergies generated as a result of ACI Worldwide and EAC Corporation's existing working relationship. This local base will play a vital role in continuing to effectively service ACI customers in France.

"ACI Monetique and ACI Worldwide (France) will work closely together to add value for the ACI customers in France," said Jeremy Wilmot, regional director of ACI Worldwide EMEA. "ACI's presence in France was strengthened following the S2 Systems acquisition, and the ACI Monetique joint venture provides an excellent platform to deliver global solutions tailored to local market conditions."

"ACI Worldwide's increased local presence enhances the company's international credibility and service quality," said Fay. "Choosing FINEAC to help provide this level of service was a results-driven choice supported by a 10-year relationship between EAC Corporation and ACI."

ACI Worldwide France, the 100 percent owned subsidiary of ACI Worldwide, will continue to market and sell ACI software solutions to the French market. Both companies will cooperate closely to provide a seamless service to the ACI customers in France.

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 84 countries including many of the world's largest financial institutions, retailers and payment processors. Visit ACI Worldwide on the Internet at www.aciworldwide.com.

About FINEAC and EAC Corporation

FINEAC is the holding company of EAC Corporation.

EAC Corporation was founded in 1995, by Jean-Marc Forlani, with a vision to provide IT expertise to clients with mission-critical applications on high-availability systems.

Due largely to the background of it's founders, EAC quickly moved into a position of niche market specialist provider to banks, card schemes and other players in the ATM-EFTPOS industry, gaining a reputation for providing high quality consultants, engineers, developers and analysts. EAC Corporation was a subsidiary of Ingenico (2001-2003), before a management buy-out through FINEAC.

In response to the growing complexity and specialisation of the projects facing their clients, EAC moved into the Professional Services market, offering project management, training services (existing courses or tailor-made to the client needs), audit, and integration, and so started to move from a resource-centred business into a project-oriented one. At the same time, the company's key skill area of ATM-EFTPOS transaction capture, authorisation processing expanded to include the entire business blueprint of card banking, from the issuance of the card-pin pair, through all aspects of transaction capture, authorisation, processing, and settlement, locally or internationally.

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, 2004, the Company's Form 10-Q/A filed on February 18, 2005, the Company's 10-Q filed on May 10, 2005, the Company's Form 8-K filed on July 1, 2005, the Company's Form 10-Q filed on August 9, 2005, the Company's 8-K filed on October 7, 2005, and the Company's 8-K filed on October 25, 2005.