Move to provide increased support for growing customer base in the region

Dubai, United Arab Emirates and London, United Kingdom - 12 May 2008 - Postilion, a leading provider of software solutions for self-service banking and payments and a division of S1 Corporation (Nasdaq: SONE), today announced further expansion in the Middle East region with the opening of new offices in Dubai's Internet City, UAE, and the strengthening of a regional professional services and support team that will focus on providing increased levels of support to existing Middle East customers and meeting growing customer demand.

"The payments market in the Middle East is developing very quickly, and we can see this continuing for the foreseeable future. Developments such as EMV compliance, PCI DSS and the move to contactless payments mean that there has been a lot of investment in POS infrastructure across the region, and the banking community will continue to innovate, supporting their merchant customers and winning new business," said Terry Xie, Director of International Research Services for Mercator. "Postilion's approach, based on open systems and providing integrated POS support, puts the company in a good position to be successful within the Middle East payments market."

"The Middle East market is growing and maturing rapidly and is a key strategic market for Postilion," said Francois van Schoor, Senior Vice President & General Manager, Postilion International. "Since 2006, Postilion's customer base in the Middle East has more than doubled. The expansion of our presence in this region will allow us to serve our customers better at a local level and also help drive the adoption of our payment solutions. We have established a strong reputation with successful implementations at major banks, retailers and processors in the Middle East and aim to build on this in the coming years."

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About 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 (PCI DSS) and Visa's Payment Application Best Practices (PABP), 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.

Postilion Middle-East
The Postilion Middle-East regional office manages the company's activities in the following countries: Bahrain, Egypt, Greece, India, Jordan, Kuwait, Oman, Pakistan, Qatar, Saudi Arabia, Turkey, the United Arab Emirates and Yemen.

About 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.

Alfa Building,
Office 404,
Internet City,
PO Box 502504,
Dubai,
UAE  
+971 4 364 2644

Press Contacts
Kato Oosthuizen - Postilion
Tel. Number: +44 (0)1932 574 700
E-mail: kato.oosthuizen@postilion.com

Abjihit Pradan - Wallis MC
Tel. Number: +971 4 390 1950
E-mail: abhijit.pradhan@wallismc.com 

© Press Release 2008