Thomas R. Mechler Unit
Thomas R. Mechler Unit
TDCJ PrisonMailing Address
Texas Department of Criminal Justice
[Inmate Full First and Last Name] — [TDCJ Number]
[Unit of Assignment]
PO Box 660400
Dallas, TX 75266-0400
[Inmate Full First and Last Name] — [TDCJ Number]
[Unit of Assignment]
PO Box 660400
Dallas, TX 75266-0400
Physical Address
4000 Highway 86 West, Tulia, TX 79088
Phone
Governing Agency
Texas Department of Criminal Justice (TDCJ)
Inmate ID
TDCJ Number — Required
Last Verified
September 25, 2026
Facility Mailing and Service Information
TDCJ uses a statewide digital-mail system for general personal correspondence. Letters are sent to the Digital Mail Processing Center, scanned and delivered electronically to the inmate's secure tablet. Inmates without tablets receive printed copies.
Use the inmate's commitment full name, TDCJ number and current unit of assignment. TDCJ states that mail missing the inmate's full name or TDCJ number will be returned.
Legal, media and special correspondence are sent directly to the inmate's assigned unit and follow separate handling rules.
Sources:
www.tdcj.texas.gov
www.tdcj.texas.gov
Use the inmate's commitment full name, TDCJ number and current unit of assignment. TDCJ states that mail missing the inmate's full name or TDCJ number will be returned.
Legal, media and special correspondence are sent directly to the inmate's assigned unit and follow separate handling rules.
Sources:
www.tdcj.texas.gov
www.tdcj.texas.gov
Last verified: September 25, 2026
Personal photos are accepted through the TDCJ Digital Mail Processing Center and are scanned for electronic delivery.
The current statewide Digital Mail FAQ does not publish one numeric photo limit that applies to every TDCJ unit. Photos and other incoming correspondence remain subject to TDCJ inspection and content restrictions.
Sources:
www.tdcj.texas.gov
www.tdcj.texas.gov
The current statewide Digital Mail FAQ does not publish one numeric photo limit that applies to every TDCJ unit. Photos and other incoming correspondence remain subject to TDCJ inspection and content restrictions.
Sources:
www.tdcj.texas.gov
www.tdcj.texas.gov
Last verified: September 25, 2026
Books, magazines, packages and other subscriptions are not sent to the Digital Mail Processing Center. They must be sent to the inmate's current unit under TDCJ publication/package rules.
Effective April 1, 2026, TDCJ states that mailed books must be new and softback. Hardback books and used books are not accepted under the revised statewide policy.
Confirm the inmate's unit and current direct-delivery requirements before sending publications or packages.
Sources:
www.tdcj.texas.gov
www.tdcj.texas.gov
Effective April 1, 2026, TDCJ states that mailed books must be new and softback. Hardback books and used books are not accepted under the revised statewide policy.
Confirm the inmate's unit and current direct-delivery requirements before sending publications or packages.
Sources:
www.tdcj.texas.gov
www.tdcj.texas.gov
Last verified: September 25, 2026
TDCJ inmate funds are handled through the Inmate Trust Fund. Do not send money to the inmate's mail address or unit address.
For deposits by mail, follow TDCJ's current instructions and send the required deposit instrument and deposit slip to:
Inmate Trust Fund
PO Box 60
Huntsville, TX 77342-0060
TDCJ also lists approved electronic deposit services. Confirm current fees and instructions before sending funds.
Source:
www.tdcj.texas.gov
For deposits by mail, follow TDCJ's current instructions and send the required deposit instrument and deposit slip to:
Inmate Trust Fund
PO Box 60
Huntsville, TX 77342-0060
TDCJ also lists approved electronic deposit services. Confirm current fees and instructions before sending funds.
Source:
www.tdcj.texas.gov
Last verified: September 25, 2026
TDCJ visitation is managed under statewide rules. Visitors should confirm the inmate's current unit and visitation status, be approved where required, review the current Unit Visitation Schedule and schedule a visit through TDCJ's visitation system when applicable.
Visitors age 18 and older must bring current government-issued identification. Lockdowns, emergencies and other security conditions may affect scheduled visitation.
Source:
www.tdcj.texas.gov
Visitors age 18 and older must bring current government-issued identification. Lockdowns, emergencies and other security conditions may affect scheduled visitation.
Source:
www.tdcj.texas.gov
Last verified: September 25, 2026
How to Address Your Letter
TDCJ uses a statewide Digital Mail Processing Center for general personal mail.
Address letters, greeting cards, drawings and photos with the inmate's commitment full name, TDCJ number and current unit of assignment:
Texas Department of Criminal Justice
[Inmate Full First and Last Name] — [TDCJ Number]
[Unit of Assignment]
PO Box 660400
Dallas, TX 75266-0400
TDCJ states that mail missing the inmate's full name or TDCJ number will be returned. General personal mail is scanned for electronic delivery.
Legal mail, media mail, special correspondence, publications, packages and certain other correspondence must be sent directly to the assigned unit.
Source: www.tdcj.texas.gov
Address letters, greeting cards, drawings and photos with the inmate's commitment full name, TDCJ number and current unit of assignment:
Texas Department of Criminal Justice
[Inmate Full First and Last Name] — [TDCJ Number]
[Unit of Assignment]
PO Box 660400
Dallas, TX 75266-0400
TDCJ states that mail missing the inmate's full name or TDCJ number will be returned. General personal mail is scanned for electronic delivery.
Legal mail, media mail, special correspondence, publications, packages and certain other correspondence must be sent directly to the assigned unit.
Source: www.tdcj.texas.gov
About Thomas R. Mechler Unit
Thomas R. Mechler Unit is a Texas Department of Criminal Justice facility in Tulia, Swisher County, Texas. Current TDCJ information identifies it as a Prison.