Dai-Ichi Kangyo Bank Limited, a Member of Mizuho Financial Group, Selects High Value Payment Processing Solution From ACI Worldwide

Business Wire, April 9, 2001

Business Editors

OMAHA, Neb.--(BUSINESS WIRE)--April 9, 2001

ACI Worldwide (Nasdaq:TSAI), a leading international provider of enterprise e-payment solutions, announces the licensing of its MTS(TM) high-value payments processing solution to The Dai-Ichi Kangyo Bank Limited (DKB), a member of Mizuho Financial Group. Mizuho was formed as a result of the consolidation of the operations of The Dai-Ichi Kangyo Bank Limited, The Fuji Bank Limited, and The Industrial Bank of Japan Limited and is the world's largest bank.

The MTS high-value payment solution will initially be used by DKB - New York for corporate e-payments and settlement, and by Mizuho Corporate Bank- New York when it is legally formed on April 1, 2002.

ACI's MTS software will provide DKB and Mizuho with high-volume, mission-critical corporate e-payment processing, and will employ enhanced routing logic to maximize the bank's ability to accomplish straight-through processing. The product combines proven reliability with scalability and exceptional flexibility, designed to help customers optimize their corporate e-payment processing environments. MTS is an integrated payments solution for domestic and international funds transfer.

MTS operates on IBM RS/6000 servers and is a member of ACI's PaymentWare(TM) family of solutions designed to meet the messaging and payment processing needs of the corporate banking industry.

About ACI Worldwide

ACI Worldwide (Nasdaq:TSAI) helps the world move money and information. Every minute of every day, financial institutions, retailers and e-payment processors rely on ACI solutions to manage payments and information. As a leading international provider of e-commerce and payment solutions, ACI maintains operations in the Americas, Europe/Middle East/Africa and Asia/Pacific. More than 2,400 customers in 78 countries use ACI distributed solutions. 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. Factors that could cause actual results to differ include but are not limited to the following.

The success of TSA, or any of its subsidiaries, entering into a new distribution or partnering arrangement depends on numerous factors including the acceptance of the distributed products or services by TSA's existing customer base and integration of the products and services into TSA's marketing efforts, the quality of the products or services as perceived after use by TSA's customers, and the degree of competition from competitive products or service providers.

TSA's business is concentrated in the banking industry, making it susceptible to a downturn in that industry.

TSA is subject to risks of conducting international operations including: difficulties in staffing and management, reliance on independent distributors, fluctuations in foreign currency exchange rates, compliance with foreign regulatory requirements, variability of foreign economic conditions, and changing restrictions imposed by U.S. export laws.

Fluctuations in quarterly operating results may result in volatility in TSA's stock price. No assurance can be given that operating results will not vary. TSA's stock price may also be volatile, in part due to external factors such as announcements by third parties or competitors, inherent volatility in the high-technology sector and changing market conditions in the industry.

For a detailed discussion of these and other risk factors, interested parties should review TSA's filings with the Securities and Exchange Commission, including Exhibit 99.01 to TSA's Annual Report on Form 10-K for the fiscal year ended September 30, 2000.