((Istesna')) means to sell by order under an agreement or contract in which the seller undertakes to manufacture and deliver a ware based on the buyer's order, and the contract of sale or mutual promise is concluded at the time of ordering. This writing is to study this matter based on jurisprudential criteria, so that the position and value of this kind of sale along the position of jurisprudence in this regard is discussed comparatively. This article is composed of two parts: understanding the subject and jurisprudential study of the matter.
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