What is the ruling on buying gasoline vouchers or food from customers at a price lower than their value?

It is impermissible to sell gasoline coupons before taking possession of them if they were acquired through a contract of exchange, due to the generality of the evidence prohibiting the sale of goods before taking possession, such as the Prophet’s (peace and blessings be upon him) statement to Hakim bin Hizam: "If you buy something, do not sell it until you take possession of it." However, if the coupons were acquired without an exchange, such as through a gift, the more sound opinion is that it is permissible to sell them, even for less than their value, because it is a sale of gasoline and not of money.

If the coupons represent food and provisions, it is not permissible to sell them before taking possession if they were acquired through a contract of exchange, which is a matter of consensus. If they were acquired without an exchange, such as through a gift, the more sound opinion is that it is permissible to sell them.