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Home > Guides > Certified mail to Canada
No. USPS Certified Mail is a domestic-only service: the post office cannot sell you certified service on a letter addressed to Canada. If you need proof a cross-border letter was sent and delivered, the usual substitutes are USPS Registered Mail, which works internationally, a trackable international service, or a courier.
Certified Mail depends on the USPS delivery network: the tracking, the delivery scan, and the signature capture all run on USPS systems at both ends of the trip. Once a letter crosses into Canada, Canada Post handles the last leg, and the two carriers never built certified service to work across their networks. The signature record that makes certified mail useful in a US court simply does not exist for a Canadian address. This is a system design limit, not a policy choice a clerk can override.
| Option | Works US to Canada? | What proof you get |
|---|---|---|
| USPS Certified Mail | No | Not available on international addresses |
| USPS Registered Mail | Yes | Chain-of-custody handling plus proof of delivery |
| USPS Priority Mail International | Yes | Tracking, but not the same legal proof as registered |
| Private courier (UPS, FedEx, DHL) | Yes | Door-to-door tracking with delivery signature options |
Registered mail is the most secure service the postal system offers: each piece is logged at every handoff, stored in locked containers, and signed for along the way. That security is why it moves slowly. For most personal letters the delay is an acceptable trade for proof; for time-sensitive legal or business mail, a courier's two-day service with a signature is usually the better buy. Match the service to what the proof is for: a contract deadline and a court filing have different stakes than a letter to a relative.
Sometimes the recipient is Canadian and the requirement comes from a Canadian contract or court, which may ask for "registered mail" specifically. From the Canadian side, that means Canada Post Registered Mail, which you get by mailing the letter within Canada. A US sender cannot buy Canada Post services at a US post office. If you need the Canadian registered service, the practical workaround is having someone in Canada mail it, or using a mailing service that prints and posts from inside Canada.
LetterAgent mails letters to both US and Canadian addresses, with the price quoted up front before anything is sent. A registered option is available, which adds tracking and proof of delivery. One honest limit: LetterAgent's US product is US Certified Mail and its Canadian product is Canada Registered Mail, so if your situation specifically requires USPS Registered Mail to a Canadian address, say so when you describe the job and confirm the proof it provides meets your need. The service is currently in private testing.
Ready to mail it? Send your letter with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is printed and mailed.
LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.
Need help? Ask your assistant: it can check a job's status any time. If it ever can't handle something: hello@getletteragent.com