S1 Corporation and Epson Forge a New Partnership

Branch Automation Provider Will Resell POS Devices for Seamless Delivery

Norcross, Georgia, (AllPayNews.com) – S1 Corporation (Nasdaq: SONE), a leading global provider of customer interaction software solutions for financial and payment services, today announced a partnership agreement with Epson, a leading supplier of value-added banking and payment hardware solutions. Under the new agreement, S1 joins a prestigious group of participants in Epson’s Envisionsm Partner Program.

Two S1 divisions, S1 Enterprise and FSB Solutions, develop and market integrated branch automation solutions and will resell Epson’s line of receipt and validation printers, check scanners and other devices used in financial institution branch offices. S1 Enterprise develops and markets S1 Teller and S1 Sales & Service and FSB offers FSB Teller, FSB Sales and Service, and FSB Teller & Branch Image Capture.

Candidates for participation in Epson’s Envision Partner Program must meet specific requirements. First and foremost, they must be established market leaders that are financially sound and enjoy high levels of customer satisfaction. Epson also seeks strategic partners that help to expand market penetration, assist with competitive wins and collaborate on leveraging emerging technologies.

“We are thrilled to welcome S1 as an Envision partner,” said Bud Weist, vice president of sales and marketing, Epson System Device Group. “This new partnership brings end-to-end seamless integration and support for virtually every printing and scanning requirement.”

“With over half of the nation’s top 20 financial institutions using Epson printers, we couldn’t find ourselves in better company,” said Mark Moore, vice president of marketing for S1 Enterprise. “Our customers will benefit because they can turn to S1 as the one source for all their branch automation needs, without the need to source the system, and then separately procure the devices, hoping they will all work together. With Epson and S1 working together, it will be a streamlined process that will facilitate a successful integration.”

About S1 Corporation

S1 Corporation delivers customer interaction software for financial and payment services and offers unique solution sets for financial institutions, retailers and processors under three brand names: Postilion, S1 Enterprise and FSB Solutions. Additional information about S1 solutions is available at www.s1.com, www.postilion.com, www.s1enterprise.com, and www.fsb-solutions.com.

About Epson

Epson is one of the world’s leading manufacturers of highly reliable point-of-service technology, including printers, precision printing mechanisms and digital image scanners. For the third year in a row (2006-2008), retailers have ranked Epson first in POS peripherals in the RIS News “Hardware LeaderBoard.” Founded in 1975 and headquartered in Long Beach, CA, Epson America, Inc. is the U.S. affiliate of Japan-based Seiko Epson Corporation, a global manufacturer and supplier of high-quality technology products that meet customer demands for increased functionality, compactness, systems integration and energy efficiency. For more information, please visit pos.epson.com/financial.

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.