Three Addresses, One Mailbox
Coxsackie publishes more addresses than almost any New York prison, and getting it wrong delays a letter by weeks.
[Full Legal Name, DIN]
Coxsackie Correctional Facility
P.O. Box 999
Coxsackie, NY 12051-0999
| Address | What it is for |
|---|
| P.O. Box 999 | Mail to an incarcerated person |
| P.O. Box 200 | The facility’s own business box |
| 11260 Route 9W | The street address, where you drive for a visit |
The DOCCS location page leads with Route 9W and Box 200. Neither is where a letter goes. The DOCCS Facilities Listing carries the inmate mail box separately, which is why the two look interchangeable and are not.
The DIN matters as much as the name. Directive 4422 has staff check, before opening anything, that the addressee can be accurately identified and is currently at the facility. A letter with a common surname and no number may not get where it is going.
Your return address goes in the top left corner. That is a requirement, not a courtesy.
Greene Correctional Facility shares this town and uses a box only 24 numbers away. Its family mail goes to P.O. Box 975, ZIP 12051-0975. A letter for someone at Coxsackie needs Box 999 and 12051-0999, so check both numbers before you seal it. The Greene address is in our Greene mail guide.
What Happens When It Arrives
Incoming mail is opened and inspected at Coxsackie by Coxsackie staff, looking for cash, checks, money orders, printed material over the limit, and contraband.
That inspection is the whole process. Nothing is scanned, photocopied or digitised, and no third-party vendor touches it. In a growing number of states a posted letter is opened by a contractor in another state and delivered as an image on a tablet. New York has not gone that way.
It is worth saying because it changes what is worth sending. A child’s drawing posted to Box 999 is a drawing when it gets there.
The Refusal List at Box 999
| Item | Why |
|---|
| Polaroids and instant photographs | Prohibited outright |
| Postage stamps | Cannot be received from outside |
| Cash, checks, money orders | Returned to sender with a deposit slip |
| A letter written by someone else and enclosed | Third-party mail, with an exception for children |
| More than five pages of printed or photocopied material | Over the limit |
| Nude or sexually explicit photographs | Prohibited |
The five-page cap surprises people. Printouts, articles, court documents, anything photocopied: five pages. A longer document needs another route, and a book or magazine has to come from an approved vendor rather than from you.
Stamps deserve a second look. You cannot send them in, so the person you are writing to has to buy their own from commissary before they can write back. If letters have stopped coming from their side, an empty commissary account is a likelier explanation than anything else.
Photographs That Arrive as Photographs
Allowed, and they arrive as photographs rather than as images on a screen.
The limits: no Polaroids or instant film, nothing nude or sexually explicit. New York publishes no numeric cap on how many photographs can go in an envelope at Coxsackie, so send a reasonable number rather than a stack.
Skipping the Envelope Entirely
You can write and send through Pigeonly rather than finding an envelope, a printer and a stamp. Upload a letter or photographs and they are printed and posted to the facility under Coxsackie’s own rules.
The address problem is the practical case for it here. Three published addresses, two of them boxes, and the one on the facility’s own page is the wrong one. Sending at the moment you have the right address in front of you avoids the envelope that goes to Box 200 and sits.
And the stamp point is not a slogan in New York. The state will not let you post stamps in, and someone with no commissary balance has no way to buy them.
Vendor Packages, and Which Unit They Are In
Packages are not mail and the rules are completely different.
You cannot post a package to someone at Coxsackie. New York allows approved vendors only, shipping by USPS, FedEx or UPS. Nothing can be brought to a visit either.
Statewide limits: three food packages a month, no more than 40 pounds combined, and two non-food packages a year.
DOCCS publishes a disapproved vendor list rather than an approved one, which is the reverse of what most people expect. Check yours is not on it before ordering.
The Coxsackie-specific catch: Directive 4911 excludes certain unit types from the package programme entirely. This prison carries four special units, including a Residential Mental Health Unit and a Regional Medical Unit. Ask the person which unit they are in before ordering, because the answer can change what is permitted.
Mail From a Lawyer
Correspondence from an attorney or a court is handled separately from ordinary post and is opened in the person’s presence rather than out of it.
For that to apply, the envelope has to show it is legal mail and identify the sender as someone entitled to send it. An unmarked envelope from a law office is treated as ordinary mail and inspected like anything else.
Mail Details Coxsackie Omits
- A numeric limit on photographs in one envelope.
- A package room address for this facility.
- How long mail takes from arrival to delivery.
- Any facility-specific mail rule. Everything above is New York’s statewide policy applied here.
Five Checks Before You Post
- Confirm in the lookup that they are still at Coxsackie, not moved back from the medical unit.
- Use P.O. Box 999. Not Box 200, not Route 9W.
- Full name and DIN on the envelope, your return address top left.
- Count printed pages and stop at five.
- Keep cash and money orders out of the envelope entirely.
All information on this page comes directly from official government and facility sources.
How we verify information ›
Last verified September 16, 2026.