Anti-Cheating Spell

An Anti-Cheating Spell (incantation unknown) is a spell that presumably prevents a person from cheating. The effects of the spell have not yet been demonstrated. This spell is used at Hogwarts School of Witchcraft and Wizardry's Writing Quills and on writing papers during their N.E.W.T. and O.W.L. exams to prevent students from cheating.

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (film)