>Today's best known examples of damnatio memoriae from antiquity concern chiselling stone inscriptions or deliberately omitting certain information from them.
>The term is used in modern scholarship to cover a wide array of official and unofficial sanctions through which the physical remnants and memories of a deceased individual are destroyed.
Certainly not exclusively from official accounts. Not sure what your point here is?
Albums Dumbledore says this in the books. Hermione only has this quote in the movie adaptations.