A man who exchanges dinars

Al-Hasan (may Allah have mercy on him) was asked: A person makes a currency exchange with dinars, and he is given counterfeit dirhams. He replied: There is no harm if he exchanges them.

Sufyan said: If they are counterfeit, they shall be returned, and he shall be a partner in the dinars according to his share.

Sufyan said: If a person comes to a money-changer with a dinar and exchanges it with him for ten dirhams, and he takes possession of the dinar while the money-changer has no dirhams? He said: If he arranges a transfer of them for him before they part, the sale is valid, because each of them has guaranteed for the other; and if it were goods, the sale would be void.

Sufyan disliked exchanging ten dirhams for nine dirhams and a fals, and saw no harm in exchanging ten dirhams for nine dirhams and gold.

Sufyan said: If he has stated it (that it has such and such a defect), he is absolved of liability, even if he does not point it out by placing his hand on it.

Abu Hanifah said: If he says: I am free of liability for every defect, he is absolved.

Rabi' bin Sa'd said: I asked Abu Ja'far about a man from whom I bought foodstuff. He gave me part of it, then he ran short and did not give me the rest, and he says: Sell me your foodstuff so that I may pay you. He said: Do not go near this transaction; it is clear usury (riba).

Al-Hasan said: Whoever keeps another person's property or steals another person's property, and then wishes to return it to him in a way that he does not know of, and delivers that property to him, there is no harm in it.

Salm says: I asked al-Hasan (may Allah have mercy on him) about two partners who together bought some goods, and then sold them at some profit, partly for cash and partly on credit. Then one of them said to the other: Give me my capital, and whatever remains is yours. Is this all right? Al-Hasan disliked it.