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The USPS Electronic Postmark™(EPM) protects the integrity of your electronic data through the use of auditable time stamps, digital signatures and hash codes. Through the USPS EPM web-based service, any third-party can verify the authenticity of electronic content. The EPM provides evidence to support non-repudiation of electronic transactions. The EPM is designed to deter and detect any fraudulent tampering or altering of electronic data.
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EPM Contact
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For more information.
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