You can't flatten an XFA file in Acrobat or Reader (Acrobat cannot edit
XFA files at all). You can only flatten PDFs (AcroForms), and without
jumping through some very complicated hoops involving EchoSign, you can
only do it in Acrobat.Preventing someone else from altering a completed
form is why digital signatures were invented. There's no other way.You
can't force a document to close itself.You can't disable any of the menu
items; unless the form has been signed it will always be possible to
c...