Stamped paper is an often-foolscap piece of paper which bears an imprinted revenue stamp. Stamped papers are not a form of postal stationery as although they may contain writing, they are not designed to be used to convey a message.

A revenue stamp, tax stamp, duty stamp or fiscal stamp is a (usually) adhesive label used to designate collected taxes or fees on documents, tobacco, alcoholic drinks, drugs and medicines, playing cards, hunting licenses, firearm registration, and many other things. Typically, businesses purchase the stamps from the government, and attach them to taxed items as part of putting the items on sale, or in the case of documents, as part of filling out the form.