No — you cannot send Certified Mail internationally. USPS Certified Mail is a domestic-only service. If you need something comparable for mail going abroad, the USPS equivalent is International Registered Mail, which costs $23.40 per piece on top of First-Class Mail International postage and can be paired with a $6.70 return receipt for signed proof of delivery.1United States Postal Service. USPS Notice 123 – Price List One catch to know before you plan around it: Registered Mail is only available for First-Class Mail International items containing documents, not merchandise or packages.
Why Certified Mail Doesn’t Work Abroad
USPS restricts Certified Mail to domestic addresses. The one exception is military mail: Certified Mail does reach APO, FPO, and DPO addresses overseas, because those are handled through the U.S. postal network rather than a foreign postal system.2United States Postal Service. Certified Mail – The Basics So if your recipient has an APO, FPO, or DPO address, Certified Mail is still an option. For any other international destination, it is not.
For everything else, USPS uses a separate international service called Registered Mail, which is designed to move securely between different countries’ postal systems.
What International Registered Mail Covers
Registered Mail is available only for First-Class Mail International items containing documents. You cannot add it to Priority Mail Express International, Priority Mail International, First-Class Package International Service, or any M-bag service.3United States Postal Service. International Mail Manual
The documents-only limit trips people up. Legal filings, contracts, immigration paperwork, and financial records qualify. Anything with commercial value — a gift, a product sample, merchandise of any kind — does not. If that’s what you’re shipping, look at Priority Mail Express International or Priority Mail International with insurance instead.
On the U.S. side, registered items are physically separated from other mail and kept in secure, restricted-access areas at every stage of transit. USPS issues a mailing receipt at the origin office and keeps a delivery record at the destination office.4United States Postal Service. Registered Mail International Once the item leaves the country, the destination country’s postal service handles it under its own procedures, which USPS does not control. Tracking is available through the USPS website, but coverage can go dark between “departed U.S.” and “delivered” depending on the country. Registered Mail does not include a delivery-time guarantee or expedited handling.
How to Send It
Prepare the Envelope
The recipient’s full address must include the postal code and country name, and it must be written in permanent ink. Addresses in pencil or any erasable format will be refused for registration.3United States Postal Service. International Mail Manual
Seal the envelope securely before you get to the counter. If you use wax or paper seals, they need a distinctive mark such as your initials or a stamp, and you must leave space at the flap intersections for the clerk to apply postmarks. Self-sealing envelopes and anything that looks like it was opened and resealed will be rejected.
Fill Out the Customs Worksheet
Depending on the destination country, you may need a customs declaration even for documents. PS Form 2976-R is the handwritten worksheet you fill out with a description of the contents, quantity, weight, and value. The retail clerk enters that information into the postal system and prints the actual customs label.5United States Postal Service. International Mail Manual – 123 Customs Forms and Online Shipping Labels You can also generate the customs form online through USPS before going in.
Be specific in the contents description. “Documents” or “papers” alone may not satisfy foreign customs. “Signed employment contract” or “immigration application supporting documents” gives customs officials a clearer picture and reduces the chance of an inspection hold.
At the Counter
Bring the sealed item and any worksheets to a USPS retail counter. The clerk verifies the seals, confirms the address is legible and in permanent ink, and applies a Registered Mail label with a unique tracking number. You must declare the full value of the contents, and that number has to match anything shown on the customs form.
The Registered Mail fee is $23.40 per piece, added on top of First-Class Mail International postage.1United States Postal Service. USPS Notice 123 – Price List You receive a mailing receipt with the tracking number. This is your official proof of mailing. Keep it — without it, you cannot file a claim later if the item goes missing.
Getting Proof of Delivery
Registered Mail on its own gives you proof you mailed the item, not proof it was delivered. The destination country’s postal service is not required to obtain the recipient’s signature unless you specifically pay for a return receipt.4United States Postal Service. Registered Mail International
The return receipt is PS Form 2865, a pink card the clerk attaches to your item at mailing. At delivery, the card is removed, signed by the recipient, and mailed back to you as physical proof of delivery.6United States Postal Service. IMM Revision – International Return Receipt You can only request it at the time of mailing, not after the fact.7United States Postal Service. International Mail Manual – Return Receipt
The return receipt fee is $6.70, and it must be added to a Registered Mail First-Class Mail International item.1United States Postal Service. USPS Notice 123 – Price List Total extra cost for Registered Mail with delivery confirmation: $30.10 before postage. If you need to prove the other side received the documents, it’s worth adding.
What Protection You Actually Get
International Registered Mail includes indemnity coverage for loss, damage, or missing contents, but the maximum payout is $40.20 as of January 2026.4United States Postal Service. Registered Mail International That ceiling applies no matter what the contents are actually worth. If you’re mailing a signed original or irreplaceable immigration documents, the indemnity won’t come close to the real cost of losing them. The registration fee itself is also not refunded even when USPS pays a claim.
Practically, the value of registration is the secure handling and the dated mailing receipt, not the money you’d recover. Make copies of everything before you mail, and think twice before trusting originals to any mail service.
If the Item Doesn’t Arrive
You can file an inquiry with USPS starting seven days after the mailing date. The deadline is six months from the date you mailed it, so don’t sit on it.8United States Postal Service. File a USPS Claim – International Only the U.S. sender can start the inquiry for an outbound registered item; the recipient abroad cannot open a case on their end. You’ll need the original mailing receipt and any customs paperwork. USPS then coordinates with the destination country’s postal administration to trace the item, which can take weeks. If the item is confirmed lost, the payout is capped at $40.20.
When Another Service Fits Better
Registered Mail is the right pick when secure handling and a dated proof of mailing matter more than speed. If speed or contents dictate otherwise, USPS has other options.
- Priority Mail Express International delivers in three to five business days to roughly 180 countries, includes tracking, offers a money-back guarantee to select destinations, and provides up to $200 in insurance for merchandise. It does not carry the chain-of-custody protocols Registered Mail uses.9United States Postal Service. Priority Mail Express International
- Priority Mail International delivers in six to ten business days and accepts packages, so it works for merchandise Registered Mail can’t handle. Tracking is included, without the secure-handling steps.
- First-Class Mail International is the base service Registered Mail rides on. Without registration, it’s the cheapest option for documents but comes with limited tracking and no delivery confirmation.
For legal documents where you need both a chain of custody and a signed delivery confirmation, International Registered Mail with a return receipt is the only USPS combination that delivers both. Private carriers like FedEx and UPS offer their own international signature-confirmation services, often faster but at much higher cost. If you’re mailing to meet a court filing deadline or prove service on a foreign party, the USPS mailing receipt with its postmark date is the most widely accepted proof of mailing among U.S. courts and agencies.