1 person found this helpful
As per the issue description mentioned above, you are getting Signature is invalid error when viewing a pdf file signed by your certificate ID, is that correct?
The reason for this behaviour could be the misconfiguration of the Trusted identities in Reader. Try the troubleshooting steps suggested in the following link:Signature valid or invalid
I followed your instructions and now my certificate is trusted on my machine
Still I get this signature invalid right after signing
Signature is INVALID.
- The document has been altered or corrupted since the Signature was applied.
- The document is signed by the current user.
Sorry for the delay in response.
Could you please try editing trust settings for certificate and see if that changes this behavior?
Go to Edit > Preferences > Signatures > Identities & Trusted Certificates > More
Trusted certificates > scroll down to the certificate > and click Edit Trust, check the box next to certified documents.
Below is the screenshot:
Also, try with another pdf file to check if its not specific to this pdf file only.
When you sign the file, are you saving it to an external store, or locally on your machine? Sometimes the attempt to place the signature into the saved document doesn't work properly if the document is not local.
Both local and on server - same error message
The only other thing I can think of is that Acrobat added LTV (Long Term Validation) information after the signature, but the signature said to lock the document (prohibiting any additions or changes). I think Acrobat is smart enough not to do this, but...
Can you post a file with the error? Or try "Click to view this version" in the expanded signature properties window to see what changed after signing.