We are offering a program to
sell fuel to people, the details of which are as follows: pay 200 riyaals
and get coupons for gas worth 210 riyaals plus a free car wash, knowing
that the amount of 200 riyaals is being paid in advance when you buy the
gas coupons. Is this offer halaal or haraam?
If the matter is as described, it is permissible to sell the coupons for gas plus a car wash for the amount stated, because the sale is in fact for the amount of gas described plus the car wash, and there is no deception, ribaa or jahaalah (purchase of unknown product) involved.