Bai-Istisna may be defined as advance purchase of a commodity/product making advance payment by the Bank on execution of a written contract wherein it is clearly mentioned that the commodity will be delivered as per specification, size, quality, quantity at a fixed future time in a particular place. The burden of cost of transportation and storage is also specially mentioned in the contract to avoid confusion. Generally, industrial and agricultural products are purchased in advance under the above terms to infuse finance so that production is not hindered for want of fund. The salient features of Bai- Istisna are as follows :