Forgeries are also common; a Dutch journalist recently had one made in the name of his prime minister.
Some believed it to be an addition made in the 16th century, perhaps even a forgery meant to look like part of the original painting.
The Pseudo-Isidorian collection, made in the mid-ninth century, contained much authentic material but with an admixture of forgery.
They are also pushing hard for a separate labelling process that will end the forgery of products made in settlements in occupied Palestine, claiming that they are made in Israel and thus getting a preferential treatment based on EU-Israel agreements.
Mr Ångström's work also challenges allegations of financial impropriety made against Ivar Kreuger, in particular that he was responsible for the forgery of Italian bonds supposedly sold to him by Benito Mussolini's government.
Excluded from the category of literary forgeries is the copy made in good faith for purposes of study.
The forgery of stereoscopic images can be conducted in two ways [15].
For a discussion of the forgery of works of art, see forgery.
Would-be forgers, take note: "It is impossible to make a forgery of Jackson Pollock's work," the critic Robert Hughes said in 1982.
The Internet and advances in computer technology have made forgery of documents and advertising of fake properties much easier.
