Det finns två stavar som reglerar minnet: obliviate , vilket raderar minnen och en falskt minne charm , vilket skapar nya. Incantationen och mekaniken hos falskminnescharmaden är okända, men de är tydligen två distinkta stavar. JKR tog upp skillnaden mellan de två i Bloomsbury Live Chat 2007:
Laura Trego: Did Hermione really put a memory charm on her parents? She says she did but then about 50 pages later tells Ron she has never done a memory charm.
J.K. Rowling: They are two different charms. She has not wiped her parents' memories (as she later does to Dolohov and Rowle); she has bewitched them to make them believe that they are different people.