To write a letter to an inmate, address the envelope with the inmate’s full committed name and ID number, the facility name, and its mailing address exactly as listed. Keep contents within the facility’s rules — usually plain paper and standard ink, no contraband, no prohibited photos. Every prison and jail has its own mail policy, so always confirm the current rules on the official DOC, BOP, or county jail website before sending.
Why a Letter Still Matters
For someone incarcerated, mail is often the most reliable lifeline to the outside world. A letter can be reread and kept. Writing well and following the rules ensures it actually gets delivered.
How to Address the Envelope Correctly
Mail is rejected most often because the envelope is addressed wrong. Include:
[Inmate Full Committed Name] [ID / Register Number]
[Facility / Unit Name]
[Facility Street Address or P.O. Box]
[City, State ZIP]Plus your full name and return address in the corner. Use the inmate’s full committed (legal) name, the correct ID/register/booking number, and a complete return address (mail without one is usually rejected). Not sure of the ID or facility? See our inmate locator guide.
General Mail Rules to Follow
- Paper and ink: plain white paper, blue or black ink. Avoid markers, glitter, perfume, lipstick, stickers, or stains.
- No prohibited content: nothing threatening, gang-related, or describing criminal plans. Mail is screened.
- Photos: often a limited number allowed; Polaroids, nudity, and oversized prints are usually banned.
- Enclosures: cash, gift cards, stamps, paper clips, and staples are commonly banned. To add money, see how to send money to an inmate.
- Greeting cards: plain cards are safer than musical, glittered, or padded ones.
Federal, State, and County Differences
Federal (BOP) screens mail and many facilities now scan incoming mail at a processing center — you may mail to a different address than the prison. State prisons set their own policies and sometimes use a scanning vendor. County jails often have the strictest rules, sometimes postcard-only or electronic-messaging only. Confirm officially.
Electronic Messaging as an Alternative
Many facilities offer electronic messaging through JPay, Securus, or GTL/ViaPath — like a restricted email where staff review messages before delivery. Fees and features vary; confirm officially. It’s faster than postal mail but lacks the personal feel of a handwritten letter.
Tips for a Meaningful Letter
- Keep it warm and ordinary — family news, pets, daily life.
- Be consistent; a short weekly letter beats a rare long one.
- Date or number your letters in case mail arrives out of order.
- Ask questions to keep the conversation going.
- Avoid sensitive legal details — mail is read by staff.
Frequently Asked Questions
What name do I put on the envelope?
The inmate’s full committed (legal) name plus their ID, register, or booking number. Nicknames can cause returns.
Can I send photos?
Often yes, within limits; many facilities ban Polaroids, nudity, and large prints. Confirm the count and type.
Why was my letter rejected?
Common reasons: missing return address, wrong ID, prohibited enclosures, banned content, or mailing to the prison instead of a processing center.
Can I send money inside a letter?
No. Use the facility’s approved deposit method — see how to send money to an inmate.
For more, see how to visit an inmate and the inmate visitation rules. Confirm the current mail policy officially before sending.
