Voice Fakery Disguises are one of the three phases of VFD disguise training. Voice Fakery Disguises is employing a fake or accented voice that is different from your own in order to create the impression that you are not yourself. Voice Fakery Disguises are used by the likes of Count Olaf and Madame Lulu in order to act as a phony persona.
Voice Fakery Disguises are mentioned in The Carnivorous Carnival (book) and Lemony Snicket: The Unauthorized Autobiography.