A sale (ba’i) contract that is enforceable. It typically involves the exchange of some types of wealth (mal) whereby one party makes the offer (to sell or buy) and the other accepts (to buy or sell). There are four types of such a sale: sahih (valid), fasid (defective), nafizh (immediately effective), and mawqoof (pending approval/ acceptance by a party/ ineffective as yet).

Ba’i mun’aqid is Arabic for enforceable contract of sale.