Founding the Owner of haraam Property after Paying its Khums
Issue No. 1546- If a person pays the khums of a halal property mixed with haram and later, the owner shows up, the obligatory precaution is to give its equivalent to him. Similarly, if a property whose owner is not known, is given away with the intention of ṣadaqa on behalf of the owner, and the owner of that property is found later and does not give consent, one should give him the equivalent of what he has given away as ṣadaqa.
