Proof of cost or value of the article at the time it was mailed is required in order for the claim to be processed. Either the mailer or the addressee must submit acceptable proof to establish the cost or value of the article at the time it was mailed. The Postal Service may request additional proof to help determine an accurate value. Be prepared to provide an estimate of repair by a reputable dealer (if applicable). (For a complete list, see DMM 609.3.2.)
When filing online, you must upload a sales receipt or paid invoice (using a .pdf or .jpg attachment). If mailing your claim, include in your mailing a copy of the sales receipt or paid invoice.
You may use any of the following as proof of value:
Note: Indemnity may be limited if you present only the packaging without the original mailing or sales receipt.