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When the form is complete, the agency certifies the document, allowing users to change only form fields and sign the document. However, if they remove pages or add comments, the document doesn’t retain its certified status.
You can apply a certifying signature only if the PDF doesn’t already contain any other signatures. A blue ribbon icon in the Signatures panel indicates a valid certifying signature.
The form author provides XML signing, validating, or clearing instructions for form events, such as button click, file save, or submit.
XML data signatures conform to the W3C XML-Signature standard.
All digital signatures and their corresponding versions can be accessed from the and manually setting its trust level.
End users often exchange certificates as needed when using certificate security.
Verification details are listed beneath each signature and can be viewed by expanding the signature. This feature analyzes the document for content that may alter the appearance of the document.
It then suppresses that content, allowing you to view and sign the document in a static and secure state.
panel displays information about each digital signature in the current document and the change history of the document since the first digital signature.
Each digital signature has an icon identifying its verification status.
Alternatively, they add certificates directly from signatures in signed documents and then set trust levels.