A melhor evidência sobre o assunto sugere que o mundo bruxo em geral estava ciente do plano Horcrux de Voldemort.
Durante seu último encontro com Voldemort, Harry e Voldemort discutem Horcruxes na frente de uma multidão de curiosos .
‘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?’
Então sabemos que todos que sobreviveram à Batalha de Hogwarts saberiam que Voldemort estava usando Horcruxes (quaisquer que sejam esses).
Uma artigo do Profeta Diário (" Reinos do Exército de Dumbledore na Final da Copa Mundial de Quadribol" originalmente publicado no Pottermore.com) também contém a seguinte referência aberta para 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?"
Como isso foi escrito por JKR, podemos supor que todo o mundo dos bruxos estava ciente da existência do plano Horcrux de Voldemort após sua derrota.