Validate a signature manually

You can assess the validity of a digital signature by checking the signature properties.

  1. Set your signature verification preferences. For more information, see Set signature verification preferences.
  2. Open the PDF containing the signature, and click the Signatures button  on the left to open the Signatures panel.
  3. Select the signature in the Signatures panel, and then choose Validate Signature from the Options menu. The Signature Validation Status describes the validity of the signature.
  4. Click Signature Properties, and do the following:
    • If the status is unknown, click the Signer tab, and then click Show Certificate to view the details of the certificate. If you