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Exhibit 31.1

SECTION 302 CERTIFICATION

I, Richard E. Cree, certify that:

1. I have reviewed this quarterly report on
Form 10-Q of T-NETIX, 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(s) and I are responsible for establishing and
maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15e and 15d-15e) for the registrant
and we have:



| |                                                                                                                                                                                                                                                                                                                                                                                                                    
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| | 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 report our conclusions about the effectiveness
    of the disclosure controls and procedures, as of the end of the
    period 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 (the registrants fourth fiscal quarter in the case
    of an annual report) 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(s) 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 the
registrants board of directors (or persons performing the
equivalent functions):



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| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | a) All significant deficiencies and material
    weaknesses in the design or operation of internal control 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 control over financial
    reporting.                                                                                                   



| |     |                    
| | --- | -------------------
| | By: | /s/ RICHARD E. CREE

| |                        
| | -----------------------
| |                        
| | Richard E. Cree        
| | Chief Executive Officer

Dated: August 7, 2003