1- is permissible to charge a fee for acting as a broker or middleman to the seller or the purchaser or both of them, provided that it is done in accordance with the stipulated conditions or local custom. 2- If the broker is working for one of the two parties to the transaction, it is not permissible for him to make a deal with the other party to increase or lower the price. 3- If the broker is working for one of the two parties to the deal in return for a specific fee, he does not have to inform the other party of it.

If the company rents out the car to the customer for a particular period, then ownership of the car is transferred to the customer automatically, without drawing up a new contract, so that the rental contract, at the end of the stipulated period, automatically turns into a sale contract, then this kind of transaction is prohibited.