عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Legal relations between creditor and debtor usually accompanied by the threat of whether the debtor fulfill the due payment or default. Therefore, accomplished creation of institutions as having the role of guarantee for the creditor, among which can name Zeman Contract which is a subordinate kind of contract following the debt, through which an acquittal person accepts financial duty annexed to other. This paper by investigating theories proposed by jurisprudence and law scholars tries to first, introduce the best theory(Vertical Tazamon) seems to be the most suitable considering needs and problems of socio-economic life then explaining the pros and cons.