How to validate signatures created with Signature Appliance

To validate signatures created in Adobe:

Depending on how the application is configured, validation may occur automatically. Signature validity is determined by checking the authenticity of the signature’s digital ID certificate status and document integrity:
  • Authenticity verification confirms that the signer's certificate or its parent certificates exist in the validator’s list of trusted identities. It also confirms whether the signing certificate is valid based on the user's Acrobat or Reader configuration.
  • Document integrity verification confirms whether the signed content changed after it was signed. If content changes, document integrity verification indicates whether the content changed in a manner permitted by the signer.
To validate signatures in Microsoft Office: 
  1. Open the Word document, Excel spreadsheet or PowerPoint presentation that has a digital signature.
  2. Double click the signature line 
    • Note: If the signature line is not available, click the red Signatures button.
  3. The Signatures pane appears. On the signature name, click the down-arrow. Select Signature Details.
    • The following image is an example of the Signatures button:An image of the DocuSign Signature Appliance button in a Microsoft Word file menu ribbon.An image of the Signature menu options in Microsoft Word.
  4. The Signature Details dialog appears.
  5. For more certificate information, click View.
  6. The Certificate dialog appears.
  7. In the General tab, view identify certificate information: 
    • Issued to   To whom this certificate was issued
    • Issued by  Which organization issued the certificate 
    • Valid from / to  Duration of certificate validity
  8. In the Details tab, view data such as:
    • Version
    • Serial number
    • Issuer
    • Subject
    • Public key
  9. In the Certification Path tab, you can identify the certificate root and certificate status.
In the user account, a trustworthy signature is valid on the computer that states it as valid.

If the signature were opened on another computer or another account, it may appear as invalid because that account may not trust the certificate issuer. For a signature to be valid, the cryptographic integrity of the signature must be intact. This means that the signed content was not tampered with, and the signing certificate has not expired or been revoked. 

View the Digital Signatures dialog:
  1. Open the file that contains the digital signature that you want to view.
  2. Click the File tab. The Microsoft Office Backstage view appears.
  3. Click the Info tab, then click View Signatures. The Signatures pane appears.
  4. In the list, on a signature name, click the down-arrow. Select Signature Details.
  5. The Signature Details dialog appears.

Have an issue? To get Support, please log in to submit a case and select Signature Appliance (DSA) as the category.