Musannaf Ibn Abi Shayba 13:3447

Abu Bakr narrated to us, he said: Hafs narrated to us, from Sulayman ibn Abd Allah, he said: Al-Hasan said: Whoever takes property from a man or steals property from a man, then wishes to return it to him in a way that he does not know, and he delivers it to him, then there is no harm in that.