"Document has been altered or corrupted since it was signed" right after signing

New Here ,
Jan 01, 2019 Jan 01, 2019

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I'm trying to sign PDFs using a digital signature from a smart card.

Right after the file is being signed, I'm seeing "Document has been altered or corrupted since it was signed" error.

Signing the file with a self signed digital signature on file works just fine.

Signing the file with the smart card signature works just fine in Foxit PhantomPDF and Comsign Trust Desktop.

I'm using Adobe Acrobat Pro DC 2019.010.200064.

I saw a previous discussion with a similar error that was not resolved.

1. From the name of the user that openner the thread it seems where both from Israel. Could it be related to some timzone issue?

2. It was suggested on this thread that it's LTV related. Is it possible to disable LTV, i.e. make Acrobat not add LTV information?

The source file (unsigned):

https://s3-eu-west-1.amazonaws.com/tepez/assets/pdf_issue/blank.pdf

File signed with smart card signature:

https://s3-eu-west-1.amazonaws.com/tepez/assets/pdf_issue/blank_signed_smart_card.pdf

File signed with file signature:

https://s3-eu-west-1.amazonaws.com/tepez/assets/pdf_issue/blank_signed_file.pdf

File signed with Comsign Trust Desktop with smart card siganture (works just fine):

https://s3-eu-west-1.amazonaws.com/tepez/assets/pdf_issue/blank_signed_comsign.pdf

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Security digital signatures and esignatures

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Participant ,
Feb 18, 2020 Feb 18, 2020

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Was there any resolution on this.  Getting the same issue here when we save our PDF.  Cert and Sig are all valid, however getting this altered message and there is no history when we look at it under Adobe Acrobat Pro DC

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New Here ,
Jul 14, 2020 Jul 14, 2020

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I have the exact same symptom, also using Comsign certificate, was there any resolution for this behaviour?

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New Here ,
Mar 15, 2021 Mar 15, 2021

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Same problem here with Comsign smart card. Is there any resolution??

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