We have a client who would like the ability to set the Document ID stamp to only appear on the first page of documents, however, currently this is not an option with ndOffice. If that option could be added it would allow them to avoid having the ID stamp on signature pages that are sent to the client and are the last page of their documents.
I wouldn't hold your breath on this :) We ended up writing our own stamper to avoid issues. The dotm API was helpful to get the ID (https://support.netdocuments.com/hc/en-us/articles/205219850-API-Documentation), and then we wrote our own to add the stamp on the pages we wanted (their stamping Is also a disaster on sections).