# Verifying Electronic Signatures

You can verify whether a document has been modified since it was signed with an Electronic Signature and whether an Electronic Signature can be trusted as follows. Perform the following procedure in Viewer.
If you want to verify the trustworthiness of an Electronic Signature, you need to open beforehand the Electronic Signature Case which stores it. Otherwise, only the modification status of the document since it was signed by the Electronic Signature is verified. You can verify one Electronic Signature at a time, or all Electronic Signatures contained in a document at once.

## Verifying a document using the pop-up menu for Electronic Signatures

You must perform the following procedures in document view, split document view, or page sorter and document view (document view side) of Viewer.
Procedure
1.
To verify one Electronic Signature, click the Electronic Signature-impression you want to verify with the right mouse button, then select [Verify the Signatures] from the pop-up menu displayed.
To verify all Electronic Signatures in a document, display the pop-up menu for one of the Electronic Signature-impressions, then select [Verify all the Signatures].
The Electronic Signatures are verified and marks indicating the verification statuses appear on the Electronic Signature-impressions.

## Verifying signatures in InfoView

Perform the following procedure in the [Signature List] tab of the InfoView in Viewer.
Procedure
1.
Select the [Signature List] tab in the InfoView in Viewer.
A list of signatures appears.
2.
To verify one Electronic Signature, click the Electronic Signature you want to verify with the right mouse button, then select [Verify the Signatures] from the pop-up menu displayed.
To verify all Electronic Signatures in a document, display the pop-up menu for one of the Electronic Signature-impressions, then select [Verify all the Signatures].
The Electronic Signatures are verified and the [Status] column of the list shows their verification statuses. Also, marks indicating the verification statuses appear on the Electronic Signature-impressions in the pages.
Note
Even if an Electronic Signature has expired, it is verified as "trustworthy" if it has been added to the Electronic Signature Case currently open. The expiration date is not checked when a signature is verified.