Set verification for time: You can select the appropriate options under 'Verification time' to check the time at which the signature was created, to check the timestamp embedded in the signature, or to check the current time.If you deselect the check box, Acrobat discards expired timestamps. It u ses the time mentioned in the timestamp or embedded in the signature, even if the signature’s certificate has expired. Use expired timestamps: The option is selected by default.The revocation status is always checked to certify signatures. If you deselect the check box, the revocation status for Acrobat Approval signatures is ignored. checkbox selected, Acrobat checks certificates against a list of excluded certificates during validation. Check the revocation status of certificates: With the Require certificate revocation checking to succeed.Contact your system administrator about specific plug-in requirements for validating signatures. The appropriate plug-in is often selected automatically. Set verification behavior: The options specify methods that determine which plug-in to choose when verifying a signature.Set automatic validation of signatures: With the Verify signatures when the document is opened check box selected, Acrobat automatically validates all signatures in a PDF when you open the document.In the 'Signature Verification Preferences' dialog that opens, you can control the following settings: Additional checks in the Preflight tool.Analyzing documents with the Preflight tool.Automating document analysis with droplets or preflight actions. ![]()
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