Validate digital signatures

You can validate a signature to verify the signer and the signed content when you receive a signed document. It helps ensure that the signer's certificate exists in your list of trusted identities and confirm if the signed content has been modified after it was initially signed. See Set signature verification preferences.

When the certifying signature is valid, an orange ribbon icon appears at the upper-left corner of the digital signature field as well as in the Signatures panel. See View verification details in signatures panel for details. By configuring verification preferences in the Preferences dialog box, you may enable automatic validation when the document is opened. See Set signature verification preferences for details.