Exhibit 99.1

Certification Pursuant to Section 1350 of Chapter 63 of Title 18 of the United
States Code

I, John M. Yeaman, the chief executive officer of Tyler Technologies, Inc.,
certify that (i) the Annual Report on Form 10-K fully complies with the
requirements of Section 13(a) or 14(d) of the Securities Exchange Act of 1934
and (ii) the information contained in the Annual Report on Form 10-K fairly
presents, in all material respects, the financial condition and results of
operations of Tyler Technologies, Inc.

                                   By: /s/ John M. Yeaman
                                       -------------------
                                   John M. Yeaman
                                   President and Chief Executive Officer