Q 1: I borrowed a sum of money from a relative who
before I was able to repay him. He had no heirs except his parents, so is it better to give this money to them, taking into consideration that they are rich, or to pay it as Sadaqah (voluntary charity) in his behalf? Please, advise me. May Allah reward you.
If the case is as you have mentioned, you should pay this money to his parents even if they are rich, for this is their right. His father, in case the deceased was indebted, should pay his debts and carry out his son's legal will and inherit the rest of his money. It is not permissible for you to act freely with the money by any means, unless his parents entrusted you with it. (Part No. 14; Page No. 152) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.