Signature not recognized on Adobe Acrobat Reader - Assinatura ñ reconhecida no Adobe Acrobat Reader

[Edson_Silva78]

English

In a digitally signed filed there are two signed fields that are not reconized when this files is opened on Adobe Acrobat Reader, but if the same file is opened on a browser these two signatures shows normally.

The screenshot below show on the left the file when opened on browser and on the right when is opened on Adobe Acrobat Reader

Could you please help me to solve this issue?

Português

Em um arquivo assinado digitalmente, há dois campos assinados que não são reconhecidos quando esse arquivo é aberto no Adobe Acrobat Reader, mas se o mesmo arquivo for aberto em um navegador, essas duas assinaturas serão exibidas normalmente.

A captura de tela abaixo mostra, à esquerda, o arquivo quando aberto no navegador e, à direita, quando aberto no Adobe Acrobat Reader

Você poderia me ajudar a resolver esse problema?

Traduzido com a versão gratuita do tradutor - DeepL.com

Adobe Acrobat Reader

Continuous Release | Versao 2025.001.20474 | 64 bits
Versao File Version: 25.001.20474.0
AGM versao 7.001.00011 | 64 bits
CoolType versao 8.003.00012 | 64 bits
Core versao 25.256 | 64 bits
JP2K versao 4.000.00002.54782 | 64 bits

[Edson_Silva78]

Even using Adobe DC the issue remains the same

Mesmo usando o Adobe DC, o problema continua o mesmo

[MikelKlink]

This most likely is due to an error in the PDF file. A minor error allowing some PDF viewers to ignore or repair it, but an error nonetheless.

Can you share the signed file for analysis? 

[S. S]

Hi @Edson_Silva78,

Hope you are doing well. Sorry for your experience with Acrobat on signatures.

This issue is observed only when the signatures' key figures are outdated or a corrupt signature file is used (as suggested above).

In such scenarios, it would be really helpful if we could get a sample file for a further deep dive into the situation.

Also, about the browser situation, web browsers tend to bypass a lot of security checks, which Acrobat does not, and if such an issue is observed on digital signatures, Acrobat would most definitely flag it.

Look forward to hearing from you.

Regards,
Souvik.

[Edson_Silva78]

Hello @MikelKlink and @S. S 

Once it is a bussiness document unfortunatelly I can't share it.

Anyway I'd like to know if is there a way to set Adobe to read these signatures or any other work arround for that?

[MikelKlink]

Once it is a bussiness document unfortunatelly I can't share it.

Anyway I'd like to know if is there a way to set Adobe to read these signatures or any other work arround for that?

Without an example file to experiment with giving an answer would be pure guesswork.

Are you still in contact with the source of those signed documents and can ask them to create and sign a similar PDF with dummy data? They should be interested in knowing why their signed documents appear unsigned in Acrobat which is a tool in fairly wide use after all...

[Edson_Silva78]

Thank you @S. S and @MikelKlink for your time to help me on this issue.

As it is not possible to share this file but I have a workarround for this, we can close this case.

Regards,

[S. S]

Hi @Edson_Silva78,

Thanks for the response.

We are glad to know that your process is up and running.

Would you mind sharing the workaround for other users with the same issue to use it as a reference?

Also, please feel free to reach out to us in case you have any questions/concern related to Acrobat.

Regards,
Souvik.

[Edson_Silva78 · Accepted solution]

Hello, @S. S 

The workarround for this issue is to open the file via a web browser, so signatures are shown.

Thanks again for you time and help.

[S. S]

Hi @Edson_Silva78,

Thanks for sharing the workaround here.

Marking this as a correct answer and locking the thread as it stands closed. This will definitely help future users with similar issues use the answer as a refernece.

Please feel free to write to us if you have any questions/concerns related to Acrobat.

Regards,
Souvik.