The Transaction in Which the Shopper Doesn't Intend to Pay the Price
Issue No.1760- If a buyer intends not to pay the price of the commodity from the beginning or intends [from the beginning] to pay for it from haram money, the transaction would be void as an obligatory precaution. However, if he does not intend so at the beginning and later pays from haram money, the transaction is correct; one should make the payment from halal money however, since haram money does not suffice.