I've done this sort of thing often (and more quick&dirty) and nobody had an issue with it yet. Just put a good quality signature on the doc and then export the

I've done this sort of thing often (and more quick&dirty) and nobody had an issue with it yet. Just put a good quality signature on the doc and then export the whole thing as fairly low quality. Making the signature blue and the rest of the document black and white probably also helps. But I never even needed that much.