The document has been altered or corrupted since the Signature was applied

New Here ,
Aug 26, 2017 Aug 26, 2017

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Using reader DC 17.012.20095 and a valid certificate stored in my Windows Certificate Store

The certificate is trusted to Sign Documents or data as well as to Certify documents.

I sign a simple text file exported to PDF by Microsoft Word

As soon as signing is done I get to view the signed PDF in Reader DC and the signature is invalid

Signature is INVALID.

- The document has been altered or corrupted since the Signature was applied.

- The document is signed by the current user.

Have no clue how to fix this

Edit: Signing with self created certificate works fine, so the issue is related to a purchased certificate from a trusted CA in which trust setting is explicitly permitting

Sign documents or data

Certify documents

Other three options are denied:

Execute dynamic content that is embedded in a certified document

Execute high privilege JavaScript that are embedded in a certified document

Perform priviledge system operations (networking, printing, file access, etc.)

Please help

Thank you

Message was edited by: Ofer Lapid

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Security digital signatures and esignatures

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Adobe Employee ,
Sep 14, 2017 Sep 14, 2017

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Hi Ofer,

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

Thanks,

Shivam

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New Here ,
Jan 26, 2018 Jan 26, 2018

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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.

Please help

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Adobe Employee ,
Feb 21, 2018 Feb 21, 2018

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Hi Oferlapid,

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.

Thanks,

Shivam

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New Here ,
Nov 05, 2019 Nov 05, 2019

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I too have the exact same problem.  Using Adobe Reader DC 2019.021.20049.

I have checked the:

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.

and all the check boxes are properly marked.  Yet when I open a the PDF file (local file store on PC) I get the same error as listed:

adobe.jpg

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Engaged ,
Feb 21, 2018 Feb 21, 2018

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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.

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New Here ,
Mar 05, 2018 Mar 05, 2018

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Both local and on server - same error message

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Engaged ,
Mar 05, 2018 Mar 05, 2018

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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.

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New Here ,
Sep 13, 2021 Sep 13, 2021

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I'm facing the same issue; I'm just picking my certificate as part of digitally signing any PDF and I receive: The document has been altered or corrupted since the Signature was applied

What am I doing wrong?

 

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New Here ,
Dec 04, 2021 Dec 04, 2021

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Same here.

So far I´m using another software when I need to sign a PDF document (the problem only happens with Acrobat Reader), but I wold appreciate if someone can point a solution.

 

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New Here ,
Jan 21, 2022 Jan 21, 2022

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Try setting the Default Signing Format to CAdES-Equivalent (Edit/Preferences/Signatures/Creation&Apperance.  It worked for me.

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New Here ,
Jan 21, 2022 Jan 21, 2022

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Hi igp1985

 

I can see you´re from Brazil (like me). I was facing the same problem when trying to sign any pdf with my e-CPF (issued by NeoId).

I solved the problem by installing the Plugin PAdES ICP-Brasil. Maybe the problem is related to the signature format adopted in Brazil not being natively supported by Acrobat.

Search for this plugin (you can download it from https://www.gov.br/pt-br/servicos/download-do-plugin-pades-icp-brasil) and install it.

While installing it I got a message saying that the plugin wasn´t compatible with the version of Acrobat I was using, bu I went on and it worked.

Depending on the changes you make in the signature configuration in Acrobat the plugin will stop working, and you´ll have to reinstall it.

I hope it works for you too.

 

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Explorer ,
May 22, 2022 May 22, 2022

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I had same issue using a certificate in Brazil that uses cloud authentication, solved removing cert. revogation info and using CAdES 

ivancarlos_0-1653244955567.png

 

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New Here ,
Jul 03, 2022 Jul 03, 2022

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I'm facing the same issue when i unchecked the option "Include signature's revocation status" during signing a document. Is that mean this option must checked during signing? otherwise the signed document will show as invalid to the others?

Thanks.

pdfsign-issue.JPG

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