Is there a way a document can be edited after being signed. Here is my
scenario: I have a document that is being filled and signed by user A.
Then at a later point user B opens the file and needs to apply changes
thus invalidating the signature of user A. After changes are made user B
would need to sign the document and lock it for editing. I need to be
able to either have the document set to as soon as any changes are made
to it the signature field to automatically clear OR some way of locking