Domestic Return Receipt | USPS.com
store.usps.com › store › productAn order of 1 equals 10 Forms. This domestic Return Receipt provides mailers with evidence of delivery (to whom the mail was delivered and date of delivery), along with information about the recipient's delivery address. USPS Tracking® service service updates are also provided when the detached receipt travels back to the sender.
Mailing Your Tax Return | USPS
www.usps.com › taxes › welcomeFor added peace of mind, you can buy a Certificate of Mailing at the Post Office. If your return is delayed or lost, a Certificate of Mailing is a proof of mailing receipt that proves you mailed your tax return on a certain date. (After you send your taxes, keep your receipt in a safe place. The Postal Service does not keep copies of receipts).