Writing a letter can be one of the simplest, most meaningful ways to support someone who is living behind bars in Canada. Whether the person you’re writing to is serving a sentence, awaiting trial, or being held in a secure facility, receiving mail often provides connection, hope, and a reminder that they’re not forgotten.
On our service, you can send letters to people who are incarcerated across Canada in different types of facilities. That includes writing to a prisoner, an inmate, a person in custody, a person in detention, or other terms that vary by province, territory, agency, and facility type.
Who can you write to in Canada?
Canada’s custody system includes both provincial/territorial facilities and federal institutions, and the language people use can change depending on where someone is held and why. Through our service, you can send letters to people in a range of custody situations, including:
Prisoners (widely understood term)
Inmates (commonly used in correctional settings)
People in custody / persons in custody (official or legal wording)
People who are incarcerated / incarcerated people (broad, neutral phrasing)
People in prison / people imprisoned
People in jail (often used for provincial or local custody)
Remand inmates / people on remand (awaiting trial or sentencing)
Pretrial detainees (awaiting trial)
Sentenced individuals / people serving a sentence
People held in custody / people held in detention
Individuals confined in a correctional facility
People in a correctional institution / correctional facility
People deprived of liberty / persons deprived of liberty (formal policy language)
No matter which term is used, the core idea is the same: you can write to someone held by authorities in a closed institution—whether that’s a remand centre, a provincial jail, a federal penitentiary, or another secure custody setting in Canada.
Why letters matter
For many incarcerated people in Canada, mail can be one of the few consistent links to the outside world. A letter can provide emotional support, encouragement, and a sense of dignity. Even short messages can make a real difference.
A letter can offer:
Connection: feeling less isolated and more human
Stability: something predictable in a controlled environment
Motivation: encouragement to keep going through a hard period
Hope: a reminder that someone cares
Important note about Canadian mail rules and delivery
Mail rules can vary by facility, and Canada’s system is split between provincial/territorial custody (often remand and shorter sentences) and federal custody (generally longer sentences). Policies can differ on what paper is allowed, whether photos are permitted, how many pages you can send, and what counts as prohibited content or contraband.
To help ensure delivery, follow the facility’s instructions for:
Address formatting
Required identifiers (offender number, FPS number, or local ID where applicable)
Limits on enclosures (photos, printed materials, cards)
Return address requirements
Common reasons mail gets rejected or delayed
Even when your message is supportive, delivery can fail for practical reasons. Common issues include:
The recipient’s name doesn’t match official records
Missing ID / offender number (when required)
No return address
Prohibited enclosures (cash, items, extra materials)
Decorative additions (stickers, glitter, perfume, tape, or bulky packaging)
Too many photos or restricted photo content
Content that triggers security review (threats, incitement, “coded” messaging)
How to address a letter in Canada (basic format)
A typical Canadian facility address format looks like this:
Full legal name of the recipient
Offender number / ID (if available or required)
Facility name
Facility mailing address (street address or P.O. box)
City, Province/Territory, Postal code
Canada
If you have housing details (unit/range), include them only if the facility instructs you to.
What you can write about (and what to avoid)
You can write about everyday life, family updates, books, music, sport, memories, encouragement, and anything respectful and human.
It’s generally best to avoid:
Instructions to break rules or bypass facility controls
Threats, harassment, or violent content
Messages that appear intentionally coded or disguised
Sensitive operational details about staff, schedules, or security practices
Also keep in mind that mail may be opened and inspected under facility rules, with different handling for legal/privileged mail.
Types of facilities in Canada you can write to
Depending on the person’s situation, they may be held in:
Provincial or territorial jails/remand centres (pretrial and shorter terms)
Federal penitentiaries (typically longer sentences)
Specialized or regional correctional institutions
Other secure custody settings
Policies vary across these systems, so correct addressing and any required identification details are essential.
Ready to send a letter?
Choose your recipient, use the correct facility address and identification details, and write a respectful, supportive message. Whether the person is called a prisoner, an inmate, or a person in custody, your letter can be a real lifeline—and a powerful reminder that they are not alone.