EXHIBIT 99.1 CERTIFICATION BY CHIEF EXECUTIVE OFFICER IN ACCORDANCE WITH SECTION 906 OF SARBANES-OXLEY ACT In accordance with Section 906 of the Sarbanes-Oxley Act, I, Michael R. Long, Chief Executive officer of Billserv, Inc. (the "Company"), state and attest, to the best of my knowledge, that the Company's Form S-3, filed with the Securities and Exchange Commission on or about November 14, 2002, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934. The information contained in this Form S-3 fairly presents, in all material respects, the financial condition and results of operations of the Company. /s/ Michael R. Long - ----------------------------------- Chairman of the Board and Chief Executive Officer November 14, 2002 20