Abstract
According to the principle of necessity of the contract, whenever a person undertakes to do something, its performance is considered his social, legal and moral duty. Of course, according to the subject of the research, the objection to the implementation of the contract is exceptional on this principle. Commitments are affected by voluntary and involuntary issues that stop the performance of obligations. Matters such as war, natural disasters and disease, death and hardship are among the most important cases of termination of contractual obligations. The purpose of this study is to identify the cases of objections that as a result of the elimination of these cases, business relations flourish. Considering the principle of necessity of contracts, resorting to accepting the objection of the contracting party will not be accepted. The parties are not allowed to change the terms of the contract unilaterally. In this study, it has been investigated that in case of incidents that lead to the suspension of the obligation, it will cause the obligation to be revoked, which has been studied comparatively with British law.