The scope of exceptions regarding the principle of inseparability obligations in iran’s law and other legal systems

The principle of inseparability payments is very important in the relationship between the debtor and creditor and indicates that the creditor can not be forced to accept the partial payment of debt . Given that this principle is not an imperative rule and it can not be associated to the public order, the parties may agree contrary to that. Also there are some exceptional cases in the law - including: the party’s agreement regarding partial payment, judicial moratorium, offset, death of debtor and transfer the subject matter of obligation to the other - that according to them the creditor can be forced to accept the payment partially. Price Fluctuations , among other things, should be considered to justify partial payment. In this paper, the principle of inseparability and its exceptions were studied partially and on case by case basis.In brief, exceptions to the principle of changeing the contract are to the extent that can seriously weaken this principle.