The ruling on selling Saudi currency for Sudanese currency without taking possession

Question:
He says: I sent money with one of the brothers and sold him Saudi riyals for Sudanese currency. When I found out the amount in Sudanese currency, I told him to buy me a car from Sudan with that amount, and I did not receive the amount from him. Is there riba (usury or interest) in this sale?

Answer:
The sale of currency for currency is called currency exchange, such as Saudi riyal for Sudanese currency or others; it is called currency exchange. It requires the exchange of possession in the session of the contract so that they do not separate while something is between them. If you paid him the Saudi currency and received the Sudanese currency, and then you gave him the Sudanese currency after receiving it and ordered him to buy a car for you with it, this is a matter of agency, and there is no harm in it. However, if you paid him the Saudi currency and told him to buy you a car with the alternative, which is the Sudanese currency, and you did not receive it from him, then this is not permissible.