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Multiple Signatories

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SPMuser View Drop Down
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Joined: 10 Nov 2016
Location: UK
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    Posted: 10 Nov 2016 at 12:45pm
Hi All,
I have Adobe Acrobat X Pro, and I'm trying to develop a document which is part of a continuous assurance process.
How can I develop a single PDF which will lock the previous section with a signature, but will allow subsequent sections to be added - with alternative signatories?
Many Thanks in advance

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Rob Lyman View Drop Down
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Post Options Post Options   Quote Rob Lyman Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov 2016 at 9:17pm
You can use Acrobat Pro to add new pages to a document that has already been signed—the process is no different than adding pages to an unsigned PDF. The signed portion of the document continues to be signed. If the newly added pages contain a signature field, it can be set to lock the previously signed portion of the document (to do this, set the "Mark all fields as read-only" option in the properties for the signature field).

The one issue is that after adding pages, the previous signature will show as ‘invalid’ in Acrobat. This is due to the way Acrobat handles signatures: the signature panel will give you an option to roll back to the signed version, which will then show as valid, so in fact the signature is not invalid. But since the document as a whole has changed since it was signed, Acrobat alerts you to this fact.

There is a way around this: a PDF form can be created that can contain templates for spawning new pages. This form can be signed, and later, new pages can spawned from the contained template—and these pages will not make the previous signature show as invalid in Acrobat. The downside is that the templates must be created before the PDF is signed.

Rob Lyman
Software Engineer
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