Postilion introduces enhanced active/active ATM Driving solution for financial institutions

Norcross, Georgia, US and London, United Kingdom, 17 Apr 2008

Postilion, a leading provider of software solutions for self-service banking and payments and a division of S1 Corporation (NASDAQ: SONE), today announced the launch of enhancements to its ATM Driving solution.

The Postilion ATM Driving solution can now be deployed in an active/active environment, ensuring higher ATM network availability while maintaining financial transaction integrity.

In an active/active Postilion environment, two production systems process transactions simultaneously across the entire ATM estate. Traffic from some ATMs is routed to one Postilion system, while other ATMs send transactions to the second Postilion system.

This allows financial institutions to intelligently spread transaction loads across two systems based on operational requirements. The Postilion active/active approach has already proven to be extremely beneficial to large multi-lane retailers.

By deploying the Postilion ATM Driving solution in an active/active environment, financial institutions now have the ultimate EFT high availability solution for their ATM networks.

"Previously, Postilion ensured ATM network availability with standard disaster recovery options. Enhanced with active/active capability, the Postilion ATM Driving solution now maximises ATM uptime and minimises back-office operational impact due to unplanned failures, thus providing improved operational efficiency, ROI, and a higher level of customer satisfaction," comments Eben Esterhuyse, Product Manager, Postilion.

Additionally, if deployed with the correct network infrastructure, an active/active Postilion ATM Driving system can function as a disaster recovery solution. During unplanned downtime due to failure at either site, whether the failure is a communications, network, server, or other data centre disruption, both servers are capable of handling 100% of the transaction load, thus maintaining online transaction processing integrity. A further advantage of an active/active Postilion deployment is that planned downtime, including scheduled server maintenance such as software and database upgrades, can be performed at one site with no downtime at the other site. From a cardholder's perspective, banking service will not be interrupted.

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 over 1 500 customers in more than 50 countries. Postilion solutions drive self-service financial transactions and payments, including advanced transactions such as prepay, through Internet access points, ATMs, POS terminals, and phones.

More than 100 000 ATMs and 500 000 POS terminals worldwide run on Postilion solutions. In the United States, over 1 250 credit unions and community financial institutions use Postilion solutions. Built on open systems, Postilion solutions provide consolidated management information, card management, 3DES and EMV enablement, and loyalty management. At the forefront of compliance with new regulations and security enhancements, such as the Payment Card Industry Data Security Standard and Visa's Payment Application Best Practices, Postilion can help customers achieve compliance with the latest data security standards developed by the payment card industry. More information is available at www.postilion.com.

S1 Corporation

S1 Corporation (NASDAQ: SONE) 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.

Forward-looking statements

This press release contains forward-looking statements within the safe harbour 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.

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