Feasibility study of the guarantee of the Dayn(debt) in Fiqh and Iranian law

According to Article 691 of the civil law, "dayn guarantees that have not yet been established are invalid." The jurists, following the jurists, tried to interpret them. Due to the establishment of dayn. they carefully tried to follow the word "cause" in addition to some jurists, in addition to its true meaning, that is, appropriate, so that the conventional tradition would be in accordance with the legal regulations. Although the existing custom and custom can be somewhat decisive, since this dispute is not resolved in jurisprudence and law, and the fegh is silent, according to Article 167 of the Constitution, the ruling must be determined on the basis of fegh standards. The results of the research, according to the rules and principles of legal jurisprudence, as well as the combination between the concept of M691 and M697, indicate that the guarantee of the future dayn of the researcher is considered correct and there is a balance between the guarantee of the future dayn and the actual existence.And insisting on the invalidation of the guarantee of the possible future dayn of the product, given that it has become a social necessity, causes the system to be disrupted.