Cannot insert pages into PDFs after signed with a digital signature in adobe 9

Question

Is there any workaround that allows me to insert additional pages into a SIGNED pdf?
Background:
Author of a form create a form that needs multiple signatures and pages appended and converts to PDF for signing. Person 1 signs it, and sends it to person 2. Person 2 needs to include additional documentation and inserts the pages before signing.
In the new version, I noticed that it changes the document security which may prevent the insert after you sign it. How do I disable this?

Answer 1

Hi Bob,
You may not like the answer, but it cannot be disabled. In previous versions, when you added a page it invalidated the signature. Starting with Acrobat 9, once the PDF file is signed you can no longer make changes that effect the content of the core PDF. The change was made to protect the integrity of the signature. You can still add comments, but (without getting too geeky) comments are not part of the core PDF like pages are, they live in a separate level. Also, you can still add form data, but like comments, what you type into a form field is not part of the core PDF.
The bottom line is, we made the change to protect the integrity of the signture, and the signature protects the integrity of the document. Thus, changes to the document are no longer allowed in signed files.
Steve