Sending a letter to someone incarcerated in Russia is primarily an addressing-and-routing problem: you need the correct identity details, the exact facility, and the facility’s official mailing address. Once those fundamentals are right, the rest is simply writing.
We at inlettia help people send letters to prisoners worldwide, including to people held in custody across Russia.
Who you can write to in Russia
In Russia, a person’s custody status typically falls into two broad categories. Some people are held while an investigation and court process are ongoing (often referred to in English as pretrial detention or remand). Others are serving a custodial sentence after conviction (often referred to as sentenced prisoners). In English-language descriptions you may also see broad terms like prisoners, inmates, incarcerated people, or people in custody—all referring to individuals held by the state in closed institutions.
Types of custodial facilities in Russia
Russia uses different institution types depending on legal status and sentence conditions. The most common structure is: detention facilities for the pretrial phase, and a separate set of institutions for serving sentences. In practical terms, this means you will usually be addressing mail either to a pretrial detention facility (commonly known by the Russian abbreviation “SIZO”) or to a sentence-serving institution such as a penal colony (often referenced by “IK”), with additional facility categories used in certain cases. The exact facility name and number are what matter for delivery.
What you need to send a letter
To prepare a letter to Russia, you should have:
- The recipient’s full name exactly as registered by the institution
- The facility’s official name (often including a number/designation)
- The complete mailing address, including city/region and postal code
- Any institutional identifier used for routing at that facility (when available)
If you’re missing an internal identifier, the single most important substitute is accuracy in the recipient’s registered name and the facility details.
Language and script
Russia uses Cyrillic in official records and addresses. If you can provide the recipient name and facility address in Cyrillic (in addition to English/Latin transliteration), it generally improves clarity for routing and internal processing. If you only have Latin characters, consistency matters: use one spelling of the name throughout and match the facility’s published address as closely as possible.
How inlettia helps
inlettia helps you send letters to prisoners worldwide by reducing the friction around recipient details and addressing. You provide what you know about the person and where they are held, and we help structure the letter for correct routing so you can focus on the content.
What to write
Keep it direct and respectful. A short introduction, a few concrete life updates, and one or two simple questions is a solid starting point. For ongoing correspondence, consistency beats length: writing regularly is usually more valuable than writing perfectly.