Inicio » Trusted Third Party (TTP) Certificates Trusted Third Party (TTP) Certificates Certificates issued and installed in our Time Stamping Units (TSUs) are used to sign electronic time stamps. These certificates can be downloaded to validate received time stamps. ANF AC also provides a free application for Time Stamping verification. TSU LIST ANF Qualified Time-Stamping Unit 1379 Serial number: 995094543777342878389947029 Issue date: 2024-03-06 11:21:57.0 GMT Expiry date: 2029-02-28 11:21:57.0 GMT Download time stamp certificate Download issuing certificate Time Stamp Policy 1.3.6.1.4.1.18332.15.1 Política de Sello de Tiempo 1.3.6.1.4.1.18332.15.1