There are lots of ways, Paul presented the best of them.What you want to
do isn't near the standard signed document workflow.Non-repudiation and
changes apart, a Digital Signature represents a sign of acceptance of
the content of the document. You not only want to change that content
was well was the layout and visual of the document by appending /
inserting new PDF.Even if you could get it to work, in a few
months/years, when someone tried to validate todays documents, chances
are, they won't b...