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How Outgoing Mail Works at Guadalupe County Jail: Don’t Seal the Envelope
Helping someone send mail from Guadalupe County Jail? Two rules matter most: label the envelope correctly and leave it unsealed.
Send Photos & Mail at Guadalupe Adult Detention Center, TX
How to send messages, photos, and packages
Overview
Guadalupe Adult Detention Center has inmate phones in the housing units daily from 7:00am to 11:00pm. Staff won't accept incoming calls or pass messages to anyone in custody. To receive calls, set up a GTL AdvancePay prepaid account through GTL at 1-866-230-7761—the vendor will register your number and handle payments. Calls keep dropping? Follow GTL's tips: don't attempt three-way calls or transfers, avoid call waiting and cordless phones, don't press tones during the call, and avoid long pauses. GTL/ViaPath disclosed an August 2020 data exposure affecting Telmate users and published a PDF with details and recommended mitigation steps.
Find an Inmate at Guadalupe Adult Detention Center, TX
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Quick Facts
- Inmate telephones are available in living units from 07:00am to 11:00pm.
- The facility does not accept incoming phone calls for inmates.
- Staff do not give messages to inmates.
- Family and friends can set up a GTL AdvancePay prepaid calling account by calling 1-866-230-7761.
- GTL/ViaPath disclosed an August 2020 data exposure affecting Telmate users and published a PDF with mitigation steps.
Send Photos & Mail Guides
guadalupe-mail-addresses-explainer
How to Send Mail to Someone at Guadalupe County Jail (privileged vs scanned mail)
Guadalupe County Jail uses two different mailing systems: privileged mail goes directly to the Seguin facility, while most other mail gets sent to a vendor for scanning and digital delivery. Using the wrong address means your letter comes back instead of getting through.
mail-two-addresses-viapath
How to Send Mail to Someone at Guadalupe County Jail: Privileged Mail vs. Viapath (Two Addresses)
Guadalupe County uses two different mailing addresses depending on what you're sending and who it's from. Pick the right one and label your envelope correctly — your mail will have a much better chance of reaching your loved one without delays.
mail-prohibited-items-and-consequences
What Gets Your Mail Rejected at Guadalupe County Jail (And Why Senders Could Face Charges)
Most rejected letters fail for the same few reasons. The checklist below will help you avoid having your mail refused, returned, or flagged as contraband.
guadalupe-mail-prohibited-items
What NOT to Put in a Letter to Guadalupe County Jail (items that will be refused)
Sending a letter to someone at Guadalupe County Jail? Keep it simple. Mail with anything stuck on, sprinkled in, or applied to the paper gets refused and returned. That includes things that seem harmless—a sticker seal, a bit of glitter on a card. You'll lose time and postage over it. Stick with a basic letter in a plain envelope, using clean, unaltered paper.
Common Questions
Can someone outside call an inmate at Guadalupe Adult Detention Center?
No. The facility does not accept incoming phone calls for inmates, and staff do not deliver messages to inmates from outside callers.
When can inmates make phone calls from Guadalupe County Jail?
Inmate telephones in the living units are available from 7:00am to 11:00pm.
How do I set up phone service so an inmate can call me?
Set up a GTL AdvancePay prepaid calling account by calling 1-866-230-7761. You’ll generally register your phone number with the vendor and add funds so calls can be completed to your line.
How can I reduce the chance of dropped calls from Guadalupe County Jail?
Follow GTL’s tips: avoid three-way calls, transfers, call waiting, cordless phones, pressing tones during the call, and long pauses. These behaviors can trigger disconnections or interruptions.
Where do I send mail for an inmate at Guadalupe Adult Detention Center?
Send personal (non-privileged) mail to Viapath at PO BOX 247, Phoenix, MD 21131 for scanning and digital delivery. Include the sender's full name and complete address, plus the inmate's full name and SO#.
Can I send physical photos to an inmate at Guadalupe ADC?
No. Photos are scanned and delivered digitally, and the facility does not accept or print physical photos.
Other Guides for Guadalupe Adult Detention Center, TX
pre-visit-checklist-guadalupe-county-jail
Before Your First Visit to Guadalupe County Jail: ID, Dress Code, and What You Can Bring
Your first visit goes much smoother when you show up with the right ID, dressed appropriately, and carrying only what the front desk allows. This guide will help you avoid getting turned away at the door.
guadalupe-visitation-schedule-and-rules
Guadalupe County Jail Visitation Schedule, Hours, and Rules (A–L vs M–Z & 2x 30-minute limit)
Visiting at the Guadalupe County Adult Detention Center comes down to timing and preparation. Your visiting days depend on the inmate's last name, hours differ for male vs. female housing, and each inmate gets two 30-minute visits per week—no exceptions.
guadalupe-books-magazines-newspapers
Sending Books, Magazines, and Newspapers to Guadalupe County Jail: How to Do It Right
Books sent to the Guadalupe County Adult Detention Center must come directly from the publisher. Even brand-new books you buy and mail yourself won't be accepted — they have to ship straight from the source.
