Contract Cancellation in the Shiite Jurisprudence and Law

In the Jurisprudence and law, there are different legal theories and institutions; They’ll organize a jurisprudence-law system altogether. Yet jurists violate most of these theories and institutions. Hence, according to comparative and simultaneous viewpoint of the Shiite jurisprudence and law, there are some unknown theories and institutions.In internal law, it is considered civil law of some foreign countries and in international law examination of some treaties concept introduces an institution for cancelling the contract.The present article aims to answer the following questions:-Is this institution of contract cancellation known for shiite’s jurisprudence and law?-What is the policy of shiite’s jurisprunce and law for contract cancellation of this institution?