Money was stolen, and I know who the thief is. Is it obligatory for me to inform the owner of the money?

Question:
May Allah reward you with good and do you well. A listener named Ayman Ismail Sarih says: He knows one of his acquaintances and knows that he stole a sum of money from a person, amounting to three thousand riyals. He says he advised him to return that amount by any means, but he did not respond.

Answer:
If the owner of the stolen money is asking about it and searching for it, and he has no evidence, while this person has information and evidence, then he should disclose it, because this is part of giving testimony, so that rights are not lost. It was mentioned in the hadith: If a person has testimony regarding a right belonging to someone, and he fears that this right will be lost, then he should disclose the testimony he has in order to deliver rights to their owners and to stop the oppressors at their limit. However, if the owner of the money does not know about it and has not asked about it, then it is better to leave it alone. Yes.