When opening a PDF file containing a digital signature that was created from a self-signed certificate on RMail, the digital signature may display a "Validity Unknown", "Signature not verified" or “At least one signature has problems” message.  This occurs when the digital certificate and digital signature associated with the PDF file have not yet been verified on the user’s system.

Please follow these steps to verify the digital certificates and digital signatures received from trusted sources (steps may vary by PDF reader program).

1. Open the PDF file in PDF Converter Professional.
2. Left click on the Digital Signature field.
3. Click "Verify Signature".
4. Click "Properties".
5. Click "Verify Identity".
6. Add "Contact information for certificate owner:".
7. Click "Add to List".
8. Click "Close".
9. Click "Verify Signature".
10. The "Validity Status" should now show "Signature is valid".
11. Click "Close".
12. Digital Signature should now display a check mark and "Signature Valid".

Not Validated Digital Signature (Image 1 of 2)

Validated Digital Signature (Image 2 of 2)