(OMAHA, Neb.—September 18, 2006) — Transaction Systems Architects, Inc. (Nasdaq: TSAI), today announced that the Company will present at Stephens 2006 Financial Services Technology Field Trip on Wednesday, September 20, 2006 at 10:30 a.m. EDT. Philip G. Heasley, CEO, Jeffrey S. Hale, Chief Marketing Officer and Anthony J. Parkinson, President, ACI Worldwide Americas will be the guest speakers.

Transaction Systems Architects, Inc. (Nasdaq: TSAI) will release third quarter financial results on Tuesday, July 25, 2006 at the close of market. The financial results will be sent over Business Wire.

(OMAHA, Neb.—June 29, 2006) — Transaction Systems Architects, Inc. (NASDAQ: TSAI), a leading global provider of enterprise e-payments and e-commerce software, has been invited to present at the William Blair & Company 26th Annual Growth Stock Conference on Thursday, June 29, 2006. Philip G. Heasley, CEO and Jeffrey S. Hale, Chief Marketing Officer will be the guest speakers.

(OMAHA, Neb.—June 8, 2006) — Transaction Systems Architects, Inc. (Nasdaq: TSAI), a leading global provider of enterprise e-payments and e-commerce software, has been invited to present at the Stephens Information Technology and Services Conference on Thursday, June 8, 2006. Philip G. Heasley, CEO and Jeffrey S. Hale, Chief Marketing Officer will be the guest speakers.

(OMAHA, Neb.—May 9, 2006)— Transaction Systems Architects, Inc. (Nasdaq: TSAI) a leading global provider of enterprise e-payments and e-commerce software, has been invited to present at the D.A. Davidson Eight Annual Financial Services Conference. Jeffrey S. Hale, Chief Marketing Officer will speak at the conference on May 9, 2006 at 9 a.m. PDT.

Transaction Systems Architects, Inc. (Nasdaq: TSAI) will release second quarter financial results on Tuesday, April 25, 2006 at the close of market. The financial results will be sent over Business Wire.

Transaction Systems Architects, Inc. (Nasdaq: TSAI) will release first quarter financial results on Tuesday, January 31, 2006 at the close of market. The financial results will be sent over Business Wire.

(OMAHA, Neb.—December 6, 2005)— Transaction Systems Architects, Inc. (Nasdaq: TSAI) a leading global provider of enterprise e-payments and e-commerce software, has been invited to present at the Stephens Inc. Bank & Payment Technology Meeting.

Transaction Systems Architects, Inc. (Nasdaq: TSAI) will release fourth quarter/fiscal year-end financial results on Tuesday, October 25, 2005 at the close of market. The financial results will be sent over Business Wire.

Transaction Systems Architects, Inc. (Nasdaq: TSAI) will release third quarter financial results on Tuesday, July 26, 2005 at the close of market. The financial results will be sent over Business Wire.

(OMAHA, Neb.—June 2, 2005) — Transaction Systems Architects, Inc. (Nasdaq: TSAI will present at the Stephens Information Technology & Services Conference on Thursday, June 9, 2005.

(OMAHA, Neb.—May 3, 2005)— Transaction Systems Architects, Inc. (Nasdaq: TSAI) a leading global provider of enterprise e-payments and e-commerce software, has been invited to present at the D.A. Davidson Seventh Annual Financial Services Conference.

Transaction Systems Architects, Inc. (Nasdaq: TSAI) will release second quarter financial results on Tuesday, April 26, 2005 at the close of market. The financial results will be sent over Business Wire.

The Annual Meeting of Stockholders will be held at 10:00 a.m. CST on Tuesday, March 8, 2005 at the Omaha Marriott Hotel located at 10220 Regency Circle, Omaha, Nebraska.

Transaction Systems Architects, Inc. (Nasdaq: TSAI) will release first quarter financial results on Tuesday, January 25, 2005 at the close of market. The financial results will be sent over Business Wire.

Transaction Systems Architects, Inc. (Nasdaq: TSAI) will release fourth quarter/year-end financial results on Tuesday, October 26, 2004 at the close of market. The financial results will be sent over Business Wire.

Transaction Systems Architects, Inc. (Nasdaq:TSAI) will release third quarter results on Tuesday, July 27, 2004 at the close of market. The financial results will be released over Business Wire.

(OMAHA, Neb.—June 8, 2004)— Transaction Systems Architects, Inc. (Nasdaq: TSAI) a leading global provider of enterprise e-payments and e-commerce software, has been invited to present at the Stephens Inc. Investment Bankers Information Technology & Services Conference.

Transaction Systems Architects, Inc. (Nasdaq:TSAI) will release second quarter results on Tuesday, April 27, 2004 at the close of market. The financial results will be released over Business Wire.

Transaction Systems Architects, Inc. (Nasdaq:TSAI) will release first quarter results on Tuesday, January 27, 2004 at the close of market. The financial results will be released over Business Wire.

Transaction Systems Architects, Inc. (Nasdaq:TSAI) will release fourth quarter and fiscal year-end results on Tuesday, October 28, 2003 at the close of market. The financial results will be released over Business Wire.

Transaction Systems Architects, Inc. (Nasdaq:TSAI) will release fourth quarter, year-end financial results on Tuesday, October 30, 2001 at the close of market. The earnings release will be sent over Business Wire.