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Marvelous_dynamism3878
New Participant
March 12, 2025
Question

Issue with Certification Signature Validation in Acrobat Reader - Possible Bug?

  • March 12, 2025
  • 1 reply
  • 934 views

Hi all,

 

I am encountering some unexpected behavior in Adobe Acrobat Reader and would like to confirm whether this might be a bug.

 

I have a single-page PDF with a certification signature, which has a DocMDP permission level of 2. This means that form fields can be filled out and new digital signatures can be added without invalidating the original certification signature.

 

However, when I add two additional digital signatures on top of the PDF, the Signature Panel in Adobe Acrobat says that the original certification signature is invalid.

 

Interestingly, when I open the same PDF in Foxit PDF Reader, the Signature Panel shows the original certification signature as valid, which is the expected behavior.

 

Has anyone else experienced this issue? Could this be a bug in Acrobat?

Below I am attaching two screenshots of each viewer with different saying.

Looking forward to any insights!

1 reply

Meenakshi Negi
Community Manager
Meenakshi NegiCommunity Manager
Community Manager
March 12, 2025

Hi Marvelous_dynamism3878,

 

Thank you for reaching out.

 

Please try validating the signature. The error appears when the signature is not added to the trusted list. Refer to the information provided in the following help document: https://adobe.ly/3FiStKa. 

 

Let us know if the issue still occurs.

 

Thanks,

Meenakshi

    M
    Marvelous_dynamism3878Author
    New Participant
    March 12, 2025

    Hi Meenaksi,

    Thanks for your quick response. Even after validating all signatures in the PDF, the certificate signature stays invalid.
    Is there any other workaround?

    Thanks,
    Jihoon

    Meenakshi Negi
    Community Manager
    Meenakshi NegiCommunity Manager
    Community Manager
    May 16, 2025

    Hi Marvelous_dynamism3878,

     

    Thank you for sharing the screenshot with us.

    Please allow us some time to check this. We will let you know once we have more information. 

    We appreciate your patience. 

     

    Thanks,

    Meenakshi

     

     

     

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