Threshold to deploy Postilion Payment Switching, ATM Driving solutions on IBM AIX Unix operating system

Threshold Financial Technologies Inc is a wholly owned subsidiary of Versent Corporation ULC, a privately owned Canadian company with more than 850 employees throughout North America.

Threshold has been actively involved in the payments industry since 1997 and has existing corporate relationships with organisations such as Meridian Credit Union, Alterna Savings Credit Union, All Trans Financial Services Credit Union, ING Bank, Sobeys, A&P, Costco Wholesale Canada, and Husky Energy. For more information, see www.threshold-fti.com.

Postilion

Postilion, a division of S1 Corporation (NASDAQ: SONE), is a leading provider of integrated solutions for self-service banking and payment processing. Our offices, on five continents, serve customers in more than 50 countries. The Postilion product drives self-service financial transactions and payments, including advanced transactions such as prepay, through Internet access points, ATMs, POS terminals, and phones. This multi-channel architecture - built on open systems - provides consolidated management information, card management, 3DES and EMV enablement, and loyalty software solutions. At the forefront of compliance with new regulations and security enhancements, such as application validation for Visa`s Cardholder Information Security Program Payment Application Best Practices (CISP PABP), Postilion can help customers achieve compliance with the latest data security standards developed by the payment card industry (PCI DSS). More information is available at www.postilion.com.

S1 Corporation

S1 Corporation delivers customer interaction software for financial and payment services and offers unique solution sets for financial institutions, retailers, and processors. S1 employs over 1 400 people in operations throughout North America, Europe and Middle East, Africa, and Asia-Pacific regions. Worldwide, more than 3 000 customers use S1 software solutions, which are comprised of applications that address virtually every market segment and delivery channel. S1 partners with best-in-class organisations to provide flexible and extensible software solutions for its customers. Additional information about S1 solutions is available at www.s1.com, www.postilion.com, www.S1enterprise.com, and www.fsb-solutions.com.

Forward-Looking Statements

This press release contains forward-looking statements within the safe harbor provisions of the Private Securities Litigation Reform Act. These statements include statements with respect to our financial condition, results of operations and business. The words "believes," "expects," "may," "will," "should," "projects," "contemplates," "anticipates," "forecasts," "intends" or similar terminology identify forward-looking statements. These statements are based on our beliefs as well as assumptions made using information currently available to us. Because these statements reflect our current views concerning future events, they involve risks, uncertainties and assumptions. Therefore, actual results may differ significantly from the results discussed in the forward-looking statements. The risk factors included in our reports filed with the Securities and Exchange Commission (and available on our web site at www.s1.com or the SEC`s web site at www.sec.gov) provide examples of risks, uncertainties and events that may cause our actual results to differ materially from the expectations we describe in our forward-looking statements. Except as provided by law, we undertake no obligation to update any forward-looking statement.