ADVISORY/S1 Corporation Hosting ``Implementing a Proactive Payment Strategy'' Webinar.

Business Editors/High-Tech Writers

ADVISORY...for Thursday (June 26)

--(BUSINESS WIRE)

S1 (Nasdaq:SONE)

Celent Communications Expert to Address the Threats and

Opportunities of Payment Revenue Attrition 

    Who:    S1 Corporation, a leading global provider of Enterprise
            solutions for the financial services industry

    What:   Webinar featuring leading industry analyst Alenka Grealish
            from Celent Communications will discuss "Implementing a
            Proactive Payment Strategy" and the threats and
            opportunities of payment revenue attrition

    When:   Thursday, June 26, 2003 from 11:00 a.m. to 12:00 p.m. EDT

    Where:  To register go to www.s1.com

Financial institutions are concerned with declining payment revenues as a result of the waning popularity of checks. In fact, check usage is declining with an estimated $271 million loss of revenue over the next five years. Additionally, as PIN-debit and online bill payment have increased, banks are losing even more revenue from loss of NSF fees.

Banks have the opportunity to overcome payment revenue attrition with the right proactive choices. Alenka Grealish, manager of Celent Communications' banking group, will discuss how institutions can capitalize on the movement away from paper to electronic with their retail and small business customers.

The Webinar discussion will review:

    --  Revenues at risk in the bill payment and point-of-sale
        segments and how the:

        --  Growth of online bill payment, direct debit and check
            conversion at the lockbox are likely to affect financial
            institutions' revenue and profits; and the

        --  Growth of PIN-debit and check conversion is likely to
            affect banks' revenue stream.

    --  How ARC -- the conversion from a paper check received at a
        lockbox to ACH -- will rapidly become mainstream;

    --  How consumer-based trends such as biller-direct online
        payments and check truncation also apply to micro-businesses
        and small businesses;

    --  What institutions should be doing to encourage retail and
        small business customers to implement online ACH, wire and
        bill payment; and

    --  How cross-selling and overdraft lending can positively impact
        financial institutions' bottom lines.

About S1 Corporation

S1 (Nasdaq: SONE) is a leading global provider to approximately 4,000 banks, credit unions, insurance providers, and investment firms of enterprise software solutions that create one view of customers across multiple channels, applications and segments. S1's Enterprise software solutions uniquely combine customer interaction and financial transaction capabilities, resulting in a more compelling experience for the customers and a more profitable relationship for the financial institution. S1 is the only provider with the proven experience, breadth of products, and financial strength to empower financial services companies' enterprise strategies. Additional information about S1 is available at www.s1.com.