PDF glossary
Certification signature
A digital signature that certifies a PDF and sets which changes are still allowed after it: none, filling and signing forms, or annotations too.
A PDF can carry one certification signature, usually the first, with a permitted-changes level: no changes, form filling and signing only, or annotations too. Other signatures are approval signatures.
In PDF-SDK
Verification tells an approval signature from a certifying one, with its permitted-changes level.
Verify PDF signaturesLast reviewed