For how long are permanent Certificates of Authenticity kept on file?

Permanent Certificates of Authenticity are retained on file for a period of 18 months. This duration allows for verification and accountability regarding transactions involving items that require proof of authenticity. Retaining the certificates for this length of time ensures that any discrepancies or queries can be addressed promptly within a reasonable timeframe after the issuance of the certificate. Moreover, this policy supports the integrity of the services provided, as it allows for consistent tracking and validation of items that are sold or processed through USPS channels.