4 KudoZ points awarded for this answer. Comment: "Thank you Steven, you are a trooper! Unfortunately it came too late for my delivery time (I only had an hour to do some 500 words formatted and all) and finally went with "IS PRINTED ON HALFTONE TINT OR WATERMARKED PAPER" just to reflect the more specific description. However, it is clear that the idea to be conveyed was that of tamper-proof or safety paper. So, thanks to the others who confirmed what I had found on Termium and also again suggested the watermarks which were my first "impression" although clearly something both more and less precise was needed! One more time I wish some sort of point splitting were possible. Dee "