1 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 6, 2000 S1 CORPORATION ------------------ (Exact name of registrant as specified in its charter) DELAWARE 000-24931 58-2395199 - ----------------------------- ------------ ------------------- (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 3390 PEACHTREE ROAD, NE, SUITE 1700, ATLANTA, GEORGIA 30326 -------------------------------------------------------------- (Address of principal executive offices) Registrant's telephone number, including area code: (404) 812-6200 ------------------ NOT APPLICABLE -------------------------------------------------------------- (Former name or former address, if changed since last report) 2 ITEM 5. OTHER EVENTS. On March 6, 2000, S1 Corporation issued a press release announcing an agreement to acquire Q-Up Systems, Inc., Austin, Texas in a stock-for-stock exchange. A copy of the press release is attached at Exhibit 99. Also on March 6, 2000, S1 held an analyst conference call to discuss the acquisition of Q-Up Systems. The content from the analyst conference is available on S1's home page at www.S1.com. Additionally, the conference will be available for replay at 1-888-203-1112 through March 10, 2000. The Q-Up acquisition is subject to Q-Up shareholder approval, any required regulatory filings and notices, as well as customary closing conditions and mutual due diligence to be completed by March 15, 2000. 3 ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS. (a) Not applicable. (b) Not applicable. (c) Exhibits. 99.1 Press release dated March 6, 2000. 4 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. S1 CORPORATION (Registrant) /s/ Lisa A. Wilkie ------------------ Lisa A. Wilkie Controller Date: March 8, 2000 5 Exhibit Index 99.1 Press release dated March 6, 2000.