After the danger had passed, Remus resigned from his position when parents learned that he was a werewolf. His sudden resignation was much to the regret of the majority of the Hogwarts students and staff, who had all grown deeply fond of him. Harry, in particular, begged him earnestly to stay, declaring that he was the best Defense Against The Dark Arts teacher that the students had ever had. Remus simply shook his head, handed him the Marauder's Map and also returned the Invisibility Cloak that was left at the Shrieking Shack, and told him that it had been a real pleasure teaching him, and that he was perfectly sure that they would soon meet again.

He sent a letter to his successor informing him of what he taught Harry and the others, but it was intercepted.