Multiple digital signatures only - why the mention ''however there have been subsequent changes to the document''?

[Vanessa Chaton]

Hello!

When I do more than one digital signature. The firstand second signatures show a warning icon and the following message: "The revision of the document that was covered by this signature has not been altered; however there have been subsequent changes to the document". The document has not been change, the only change authorized was the addition of valid digital signature.

Why does it shows this message?

What can I do if I want both signatures to show "the document has not changed since it was signed"?

 

support's links, where i did not find an answer: 

https://www.gonitrodev.com/fr/user-guide/pro/article/view-and-validate-certificates-and-signatures

https://www.gonitrodev.com/fr/user-guide/pro/article/certify-pdf-files

https://www.gonitrodev.com/fr/user-guide/pro/article/create-a-digital-signature-field-in-a-pdf

 

Thanks

[Allain Umailin]

Hello @Vanessa Chaton,

Thank you for reaching out to us through our Community Forums!

When a Digital Signature is placed on a document, it also comes with ranging levels of security. This security option will prevent you from doing certain tasks and editing on the document.  This includes placing more than one digital signature and this is by design.

However, as an author of a document, user can certify it to control what can and cannot be done to the content while retaining the certified status.

If changes occur to the document that the author have not permitted, then the document is invalidated and the certificate is revoked. 

Please be aware that PDF files can be certified only once, but if permissions allow, can be digitally signed many times. This is the benefit of certifying the files you author, rather than signing it.

Also it is worth notating that when a user share certified PDFs, the other users' PDF viewer must support the functionality for certification and signatures to work correctly. 

To learn more about Certifying and Signing, please refer to this article:
https://kb.gonitro.com/knowledgebase#/search/certify/000004497 

Thank you for choosing Nitro and I hope this helps.