Certified Mail for cancellations: what it proves

Certified Mail is a USPS extra service you add to a First-Class Mail or Priority Mail item. The Domestic Mail Manual describes it as providing the sender with a mailing receipt and, upon request, electronic verification that an article was delivered or that a delivery attempt was made. USPS puts it more simply: “Prove you sent it. See when it was delivered or that a delivery attempt was made.”

You buy it at a Post Office. To get a postmarked sender's receipt, hand the letter to a postal employee at the counter rather than dropping it in a collection box. The recipient may be asked to show ID before the letter is delivered.

Certified Mail records the envelope, not the letter inside it. If a company later says it received an empty envelope or a different letter, the tracking record cannot settle that on its own. That is why the copy of the signed letter matters: it shows what you sent, and the receipt and tracking number tie it to the envelope.

• Write the tracking number and mailing date on your copy of the letter.
• Keep the copy with the receipt, not in a separate folder.
• If you enclose anything else, such as a member card or a doctor's note, list it at the bottom of the letter.

It also does not prove that the company acted on your letter. Ask for written confirmation in the letter itself, and keep the confirmation when it arrives.

A Certificate of Mailing is a different USPS service. It is an official record of the date your mail was presented to USPS, available only at the Post Office and only at the time of mailing. It shows that you sent something but gives no delivery record, and USPS does not keep a copy. For a cancellation where you need to show the company received your letter, Certified Mail is the service that records delivery.

1. 1

   Keep the paper receipt

   USPS says to keep your receipt in a safe place because the Postal Service does not keep copies of receipts. Photograph it the same day as a backup.

2. 2

   Save the tracking page

   USPS shows tracking history online for 120 days for items without a signature and 2 years for signature items. Save the page as a PDF or a screenshot once it shows delivered.

3. 3

   Extend the history if you may need it later

   USPS Tracking Plus extends online tracking history for up to 10 years and lets you request a statement of the tracking by email. It is bought online through USPS Tracking while the original history is still available.

4. 4

   Store the return receipt with the rest

   File the green card or the emailed receipt with your letter and mailing receipt. If you paid for a green card and it never came back, you can ask a Post Office for the delivery record within 90 days of the purchase using PS Form 3811-A.

5. 5

   Keep it all until the charges have stopped

   Hold on to the records at least until the final billing date has passed without a charge, and longer if you are disputing a charge. A card dispute or complaint will ask for exactly these documents.

If your deadline counts from the postmark, take the letter to a Post Office retail counter. USPS applies a hand-cancelled postmark at the counter free of charge, and recommends asking for one when the postmark date must match the day you mailed the letter.

If your deadline counts from delivery, the postmark date is less important than the transit time. USPS lists First-Class Mail at 1 to 5 days, so give the letter a margin. The cancellation deadline calculator works out the last safe day to post it.

When a company keeps charging you after your letter arrived, the delivery record is the date you point to. Send the company a copy of the letter and the tracking record, list the charges made after delivery, and ask for a refund. If that fails, the same documents support a billing dispute with your card issuer. Our guide on what to do when a company keeps charging you covers the steps and deadlines.

Letter copy, postmarked receipt, saved tracking page, return receipt: together they show what you sent, when you sent it and when it arrived.

If you would rather not queue at the Post Office, we print your letter, send it by certified mail and send you the delivery proof. See how it works.