Förutom de andra svaren kontrollerades all post in och ut från Hogwarts:
"All the owls are being checked too," said Hermione.
"But I thought all the owls were being searched. So how come these girls are able to bring love potions into school?"
Även om det inte uttryckligen anges att det var ministeriet som kontrollerade posten, vet vi att under samma tidsperiod var Weasleys brev också kryssat och där uttryckligen anges att det kontrollerades av ministeriet:
These measures have caused a certain amount of inconvenience to Arthur and Molly – all their post, for instance is being searched at the Ministry before being sent on.
"Can't be anything dangerous, all our mail's still being searched at the Ministry," replied Ron, though he was eyeing the parcel suspiciously.