Validating digital signatures and display special icons
Step 2: Select the Digital Signatures tab in the Properties window.Step 3: If you see signatures listed on the tab, you know that the file has been signed digitally.
The following guide lists several methods to verify digital signatures of programs on a computer running Windows.
Many browsers today open PDFs automatically within the browser without using your computer’s Adobe software.
If you are not using Adobe Acrobat or Reader, the digital signature validation process may not occur.
A digital signature, viewed through the GPO Seal of Authenticity, verifies document integrity and authenticity on GPO online Federal documents.
GPO uses a digital certificate to apply digital signatures to PDF documents.