Lukas Bank to expand card management, payments processing capabilities with Postilion

London, United Kingdom / Wroclaw, Poland, 18 Sept 2007

Postilion, a leading provider of transaction processing solutions and a division of S1 Corporation (NASDAQ: SONE), today announced that Lukas Bank, Poland's leading provider of consumer finance and retail banking services, has chosen the Postilion payments processing engine for its credit and debit card issuing and processing services.

Lukas Bank selected Postilion to support the growth plans of its cards business and to allow it to bring selected outsourced operations in-house.

Lukas Bank, part of the Cr'edit Agricole group and one of the largest issuers of credit cards in Poland, with over 1.3 million cards in circulation, provides co-branded and 'store cards' for a range of retailers. By utilising the Postilion open-systems platform, Lukas Bank plans to offer a wider range of products and services to its business partners and customers while reducing its operational costs.

Piotr Buszka, Vice-President of Lukas Bank, said: "Bringing operations onto Postilion's open-systems platform delivers greater levels of flexibility, reduces our costs and improves the service we can provide to our partners and cardholders. Outsourcing our card and payment processing was an effective solution for our business, but not sufficient given our business plans and long-term growth. With Postilion, we will have greater control over our own card products and services and can easily add new functionality to support innovative business requirements."

Postilion's EVP for Business Development, Central and Eastern Europe, Andrew Marshman, said: "The relationship with Lukas Bank demonstrates how Postilion can provide a very simple and cost-effective way for organisations to manage complex cardholder services. Lukas Bank has ambitious plans to grow its customer base and broaden the range of services it offers, and we are extremely pleased that they will rely on Postilion to help meet their objectives."

Lukas Bank joins Postilion's growing list of Eastern European customers that includes Euronet Worldwide, eService, GE Money, and PayTel.

Lukas Bank

Lukas Bank SA is a modern retail bank providing comprehensive financial services to personal customers, self-employed persons and small companies. The bank is one of the fastest developing financial institutions in Poland. Friendly attitude, easy and convenient service as well as a combination of advantages of a traditional bank and a virtual bank - these are the traits which make us stand out in the market. Lukas Bank operates two specialised business lines: retail banking and consumer finance.

As part of its retail banking line, Lukas Bank provides banking services to personal customers and self-employed persons. A diversified offering in combination with access to modern financial services, not only in bank outlets but also via telephone and the Internet, makes Lukas Bank top the rankings of the best Polish banks. Lukas Bank is a leader in the Polish consumer finance market, providing personal customers with instalment loans for the purchase of goods and services, cash loans and car loans. Its offer also comprises credit cards with renewable limits and, jointly with shopping chains, co-branded cards.

Variety of the product offering and access to a wide range of modern banking services at branches, as well as over the telephone and the Internet, are the ingredients of our success, as measured by annual rankings of the best banks in Poland in which Lukas Bank consistently scores top marks. Lukas Bank garners rave reviews not only from financial industry experts, but also - just as importantly - from our customers.

Since 2001, Lukas Bank SA has had a strategic investor - the French bank Cr'edit Agricole. Hence, Lukas Bank became part of one of the world's biggest financial institutions. Lukas Bank SA and companies of the Europejski Fundusz Leasingowy Group all make up Cr'edit Agricole Polska.

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 (NASDAQ: SONE) 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 comprise 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.

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Lukas Bank to expand card management, payments processing capabilities with Postilion

Open-systems platform chosen to reduce costs and increase flexibility.