Validating Signatures - Adobe 22002420 - Acrobat Standard - PC User Manual

If you're adding a visible signature, draw the signature field on the page. Follow the on-screen instructions to select
4
a digital ID, if prompted.
Specify a default ID to avoid being prompted each time you sign a PDF.
In the Certify Document dialog box, specify the permitted changes, type your password, and then click Sign.
5
6 Save the PDF using a different filename than the original file, and then close the document without making
additional changes.
See also
"Change the signing method" on page 201
"Specify the default digital ID" on page 201
"About digital IDs" on page 198
Clear or remove a digital signature
❖
Do one of the following:
• To remove a signature, right-click/Control-click the signature field and choose Clear Signature Field.
• To remove all signatures in a PDF, choose Clear All Signature Fields from the Options menu in the Signatures
panel.
If you want to delete the signature field, choose Tools > Advanced Editing > Select Object Tool, select the signature
field, and press the Delete key.

Validating signatures

Checking the validity of a signature
By default, signatures are validated when you open a PDF. An icon appears in the signature field on the document
page to indicate the signature status. Further details about the status appear in the Signatures panel and in the
Signature Properties dialog box.
Third-party signature handlers may provide alternate methods of validating signatures. Check the documentation
included with your third-party digital ID.
Important: To ensure that signatures are validated when you open a PDF and that all verification details appear with
the signature, set your verification preferences in advance (see "Set signature verification preferences" on page 229).
• The digital signature icon
of an unsigned signature field.
• The blue ribbon icon
fying signatures can be visible or invisible.)
• The check mark icon
• The red x icon indicates that the signature is invalid.
• The caution triangle icon
along with the name of the field in the Signatures panel indicate the presence
indicates that the PDF is certified—that is, it contains a valid certifying signature. (Certi­
indicates that the signature is valid.
indicates that the document was modified after the signature was added.
ADOBE ACROBAT 8 STANDARD
User Guide
227