List of UFO-related hoaxes

Many hoaxes related to the study of unidentified flying objects have been perpetrated.

Beginning in 1993, Ray Santilli was either the victim or perpetrator of a hoax involving film footage that purported to show an autopsy being conducted in 1947 upon an alien related to the Roswell UFO incident. Santilli auctioned off the rights to be first to broadcast the film, which were won by the American Fox Broadcasting Company and presented in the 1995 show Alien Autopsy: Fact or Fiction and later in other programs. The footage had a deep impact through the media and all of the world televisions broadcast pictures representing what appears to be a corpse lying on a bed. It was revealed to be a hoax. The Project Mogul was the official explanation of the case

The French sociologist Pierre Lagrange explained his point of view about the case:

Santilli initially stated he bought the film of Jack Barnett, an American who claimed (though turned out not to be) the commander of the US army. Santilli gave cuttings of the film to experts. However, he didn't give them the photos they took. This is because the photos were in a much clearer quality than the footage, so people could easily see the latex dummies.

A photograph taken on Ilkley Moor in West Yorkshire on December 1st, 1987, was alleged to be of an alien. The English newspaper the Daily Star claimed to expose it as a hoax in its edition of July 2nd, 1989: saying that the alien in the picture was in fact an insurance broker, unsuspecting he was being photographed, while he visited his clientele in the outskirts and cut through the hills. Belgian investigators analysing the case stated "mais comment imaginer que des enquêteurs expérimentés aient pu se laisser prendre à un aussi banal canular ou méprise" (But how can we imagine that experienced investigators could have been misled by such a casual hoax?). They were right to be cautious. The theory was imaginative but incorrect and computer enhancements of the picture proved it was not a human riding a bike carrying a brief case as suggested. However, the case is much more complex and involved an alleged alien abduction as sequel plus physical evidence including a compass that had reversed polarity. It was subjected to very extensive investigation by scientists and psychologists at various north west universities without clear resolution. The most updated account is from Peter Hough & Jenny Randles, Fortean Times 230, 2007. Opinion of UFO researchers today is split but some believe it is most probably a hoax that got out of hand—possibly involving a large model carried onto the moor. The witness has consistently denied this and he sought to make no money out of the use of the photograph to rule out any financial incentive.

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