EXHIBIT 31.1

                                 CERTIFICATIONS

I, John M. Yeaman, certify that:

     1.  I have reviewed this quarterly report on Form 10-Q of Tyler
         Technologies, Inc.;

     2.  Based on my knowledge, this quarterly report does not contain any
         untrue statement of a material fact or omit to state a material fact
         necessary to make the statements made, in light of the circumstances
         under which such statements were made, not misleading with respect to
         the period covered by this quarterly report;

     3.  Based on my knowledge, the financial statements, and other financial
         information included in this quarterly report, fairly present in all
         material respects the financial condition, results of operations and
         cash flows of the registrant as of, and for, the periods presented in
         this quarterly report;

     4.  The registrant's other certifying officer and I are responsible for
         establishing and maintaining disclosure controls and procedures (as
         defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the
         registrant and we have:

         a)    Designed such disclosure controls and procedures or caused such
               disclosure controls and procedures to be designed under our
               supervision, to ensure that material information relating to the
               registrant, including its consolidated subsidiaries, is made
               known to us by others within those entities, particularly during
               the period in which this quarterly report is being prepared;

         b)    Evaluated the effectiveness of the registrant's disclosure
               controls and procedures and presented in this quarterly report
               our conclusions about the effectiveness of the disclosure
               controls and procedures, as of the end of the quarter covered by
               this report based on such evaluation, and

         c)    Disclosed in this report any change in the registrant's internal
               control over financial reporting that occurred during the
               registrant's most recent fiscal quarter that has materially
               affected, or is reasonably likely to materially affect, the
               registrant's internal control over financial reporting; and

     5.  The registrant's other certifying officer and I have disclosed, based
         on our most recent evaluation of internal control over financial
         reporting, to the registrant's auditors and the audit committee of
         registrant's board of directors (or persons performing the equivalent
         functions):

         a)    All significant deficiencies and material weaknesses in the
               design or operation of internal controls over financial reporting
               which are reasonably likely to adversely affect the registrant's
               ability to record, process, summarize and report financial
               information; and

         b)    Any fraud, whether or not material, that involves management or
               other employees who have a significant role in the registrant's
               internal controls over financial reporting

Dated: July 31, 2003                   By: /s/ John M. Yeaman
                                           ------------------
                                           John M. Yeaman
                                           President and Chief Executive Officer



                                 CERTIFICATIONS

I, Theodore L. Bathurst, certify that:

1.  I have reviewed this quarterly report on Form 10-Q of Tyler Technologies,
    Inc.;

2.  Based on my knowledge, this quarterly report does not contain any untrue
    statement of a material fact or omit to state a material fact necessary to
    make the statements made, in light of the circumstances under which such
    statements were made, not misleading with respect to the period covered by
    this quarterly report;

3.  Based on my knowledge, the financial statements, and other financial
    information included in this quarterly report, fairly present in all
    material respects the financial condition, results of operations and cash
    flows of the registrant as of, and for, the periods presented in this
    quarterly report;

4.  The registrant's other certifying officer and I are responsible for
    establishing and maintaining disclosure controls and procedures (as defined
    in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and we
    have:

    a)    Designed such disclosure controls and procedures or caused such
          disclosure controls and procedures to be designed under our
          supervision, to ensure that material information relating to the
          registrant, including its consolidated subsidiaries, is made known to
          us by others within those entities, particularly during the period in
          which this quarterly report is being prepared;

    b)    Evaluated the effectiveness of the registrant's disclosure controls
          and procedures and presented in this quarterly report our conclusions
          about the effectiveness of the disclosure controls and procedures, as
          of the end of the quarter covered by this report based on such
          evaluation, and

    c)    Disclosed in this report any change in the registrant's internal
          control over financial reporting that occurred during the registrant's
          most recent fiscal quarter that has materially affected, or is
          reasonably likely to materially affect, the registrant's internal
          control over financial reporting; and

5.  The registrant's other certifying officer and I have disclosed, based on our
    most recent evaluation of internal control over financial reporting, to the
    registrant's auditors and the audit committee of registrant's board of
    directors (or persons performing the equivalent functions):

    a)    All significant deficiencies and material weaknesses in the design or
          operation of internal controls over financial reporting which are
          reasonably likely to adversely affect the registrant's ability to
          record, process, summarize and report financial information; and

    b)    Any fraud, whether or not material, that involves management or other
          employees who have a significant role in the registrant's internal
          controls over financial reporting

Dated: July 31, 2003              By: /s/ Theodore L. Bathurst
                                      -------------------------
                                      Theodore L. Bathurst
                                      Vice President and Chief Financial Officer