# Verification Statuses of Signatures

When a document has just been opened, signatures on it are not yet verified. After verification of a signature, a mark indicating the verification status and editing status is added to the signature on the page.

## Types of verification statuses

There are 6 types of marks indicated on a signature. The shape and meaning of each mark is described in the table below.

Mark | Verification status | Description
--- | --- | ---
| Validity Unknown | The document has not yet been verified.
| Not Modified | If this signature is the final signature, it indicates that the document has not been modified since it was saved with the signature applied. If this signature is not the final signature, it indicates that the document has not been modified since it was saved with the signature applied until it was signed subsequently. The credibility of the certificate that was used for signing the document is not verified.
| Modified | If this signature is the final signature, it indicates that the document has been modified since it was saved with the signature applied. If this signature is not the final signature, it indicates that the document has been modified since it was saved with the signature applied until it was signed subsequently. The credibility of the certificate that was used for signing the document is not verified.
| Invalid | Data of the document was tampered or destroyed at the time it was signed with this seal. The document was modified by means of a way other than DocuWorks editing operations. Or, the certificate that was used for signing the document is invalid.
| Not Modified/Trustworthy | If this signature is the final signature, it indicates that the document has not been modified since it was saved with the signature applied. If this signature is not the final signature, it indicates that the document has been modified since it was saved with the signature applied until it was signed subsequently. The certificate that was used for signing the document is trustable.
| Modified/Trustworthy | If this signature is the final signature, it indicates that the document has been modified since it was saved with the signature applied. If this signature is not the final signature, it indicates that the document has been modified since it was saved with the signature applied until it was signed subsequently. The certificate that was used for signing the document is trustable.

If the Digital Certificate used for this signature is invalid, there may be several reasons as below:

- The signature on the certificate was incorrect.
- The certificate could not be chained to its root certificate.
- The certificate was expired.
- The key of the certificate (KeyUsage field) was not used correctly.
- The certificate was revoked.

You can change the method for determining whether the certificate has revoked in the [Preferences] dialog box.
In the case where the certificate could not be chained to the root certificate, check to see if the root certificate from the root Certification Authority which is the issuer of the certificate is registered in the [Trusted Root Certification Authorities] tab in [Certificates].

## Showing or hiding verification statuses

This section describes how to specify showing or hiding verification statuses when a document is displayed or printed. 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.
Select [Signatures Status] from [Signature] in the [Document] menu. Or right-click a signature on a page, and select [Signatures Status] from the pop-up menu. The marks indicating the verification statuses are displayed when a checkmark is shown next to [Signatures Status].
Note
If you print a signed document from Desk, the mark indicating the not-yet-verified status appears on the printout. If you print a signed document from Viewer, a mark indicating the verification status at the time of printing appears on the printout.

## Checking verification statuses

You can check the verification status also in the [Signature Properties] dialog box, in the [Signature List] tab in InfoView in Viewer, or in the tool tip of the signature, in addition to by the indication mark on the signature.