The Electronic Postmark® (EPM®) Service is a content integrity and time-and-date stamp application which can be used to verify the authenticity of a document or file sent electronically as of a specific point in time.

• Detect: The EPM Service allows users to detect whether or not documents or files stamped with an EPM have been altered or modified.

• Trust: EPM seals issued by Authentidate are stored in an approved and highly secure environment for up to seven years from date of application.

• Protect: The U.S. Postal Service® (USPS) is the backup verifier for all EPM seals applied.

To get started, simply click the Login button above, create an account and download the software today!

Or, to learn more about other Authentidate offerings which incorporate the USPS EPM seal ,click here.








*Authentidate is an authorized EPM® Service Provider.