# Validate signatures

When you open a document, a status icon appears next to the signature, indicating if the signature is valid.

1. Click Signatures in the navigation pane, and select the signature.
2. Right-click/Control-click and choose Show Signature Properties.
3. Use the various tabs and options in the Signature Properties dialog box to resolve any signature issues. For example, if the identity is unknown or unverified, click the Signer tab, and click Show Certificate to determine if the certificate is trusted.