The title object is discovered to have been subject to this practice at the end of The (*) Maltese Falcon.
William Ireland did this to the legal papers of Shakespeare, and in Robert Louis Stevenson's The Beach of Falesa, Case is discovered doing this to trinkets. The title object is discovered to have been subject to this practice at the end of The (*) Maltese Falcon. While making a film about  this practice focusing on Elmyr de Hory, Orson Welles conducted interviews with Clifford Irving, who did this to the diary of Howard Hughes. For 10 points, Piltdown Man and the Hitler diaries were also notable examples of what crime?
William Ireland did this to the legal papers of Shakespeare, and in Robert Louis Stevenson's The Beach of Falesa, Case is discovered doing this to trinkets.
{forgery} or word forms; some of the {clues} are about {art forgery} or other {specific} forms {so} accept {modifiers} like that