Multiple digital signatures in one file

I have a client who wants me to combine 4 different forms into one--then--require a digital signature by the same person after each independent form. So that would be 4 digital signatures total. And all identical. I'm using a different name per each field so there's no conflict.
It appears to work fine until I have it submit dynamically with a PHP script via email inbox.
When I open the PDF (having crunched the info back in from an FDF) the data is there EXCEPT the digital signatures.
Can someone point me to a tutorial?
Best regards,
Mare

Hi Mare,
You cannot merge files and expect that the digital signatures will be preserved. When you sign a file you are signing all of the bytes in that file, and only that file. Once you combine files you are creating a new unsigned file. If someone were to sign the new file they are signing all of the bytes in the new file, not just some of the bytes. There is no "page level" signing in PDF files, only whole file signing.
You can however put the signed files into a Portfolio file. A Portfolio keeps the files separate. Think of a Portfolio like a file cabinet in the physical world. Just because you put different files into the file cabinet drawer, they don't merge.
Steve

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I have an Interactive Forms that requires the digital signing of 6 different users. There is a control under the Web Dynpro Native named : Signature : Sign and Lock which allows multiple signatures but I am not able to use it correctly.
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Hi Mare,
You cannot merge files and expect that the digital signatures will be preserved. When you sign a file you are signing all of the bytes in that file, and only that file. Once you combine files you are creating a new unsigned file. If someone were to sign the new file they are signing all of the bytes in the new file, not just some of the bytes. There is no "page level" signing in PDF files, only whole file signing.
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http://office.microsoft.com/en-us/excel-help/add-or-remove-a-digital-signature-in-office-files-HA010354308.aspx
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Steve,
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I have one document that I am sending out to multiple people at the same time. I need these people to digitally sign this document concurrently. Once they sign the document, it is sent back to me. Which causes me to have multiple copies of the same document, but with different signatures. I need to then consolidate these multiple documents into one document with all of the signatures. I've been attempting to do this with distributing the document and then merging the document but it is not working. Can someone please help?

Hi,
Acrobat does not support parallel signing where multiple people can concurrently sign one document. A document can only be signed sequentially where one person signs it and then sends it to the next person for signing. If you have one document that requires multiple signatures and you need all of the signatures on one page, then you have to work with just one copy. However, working with multiple copies of the document like you are doing now, you could consolidate each signed copy into a Portfolio. If for example you needed 10 signatures your Portfolio file would end up containing 10 individually signed copies of the same PDF file.
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I hope this helps,
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Multiple digital signatures in one file

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