Det bästa beviset på ämnet skulle föreslå att Wizarding World generellt var medveten om Voldemorts Horcrux-plan.
Under hans sista möte med Voldemort diskuterar Harry och Voldemort Horcruxes framför en publik av åskådare .
‘I don’t want anyone else to try to help,’ Harry said loudly, and in the total silence his voice carried like a trumpet call. ‘It’s got to be like this. It’s got to be me.’
Voldemort hissed.
‘Potter doesn’t mean that,’ he said, his red eyes wide. ‘That isn’t how he works, is it? Who are you going to use as a shield today, Potter?’
‘Nobody,’ said Harry simply. ‘There are no more Horcruxes. It’s just you and me. Neither can live while the other survives, and one of us is about to leave for good …’
‘One of us?’ jeered Voldemort, and his whole body was taut and his red eyes stared, a snake that was about to strike. ‘You think it will be you, do you, the boy who has survived by accident, and because Dumbledore was pulling the strings?’
Så vi vet att alla som överlevde slaget vid Hogwarts skulle ha varit medvetna om att Voldemort använde Horcruxes (vad som än är).
En Daglig profetartikel ( Dumbledores Army Reunites vid Quidditch World Cup Final " som ursprungligen publicerades på Pottermore.com) innehåller även följande öppna referens till Horcruxes
"Was the work of the Auror Department too much for a man who has admitted that the destruction of He Who Could Not Be Named's Horcruxes 'took its toll' on him?"
Eftersom det här skrevs av JKR själv, kan vi ganska glatt antar att hela trollkarlen var medveten om förekomsten av Voldemorts Horcrux-plan efter hans nederlag.