One who undertakes is obligated to discharging his commitment and must discharge his debt with regard to obligee.We certainly can say that nowadays, compensation is the most common reason for lack of commitment. For this reason, various religious and civil schools have studied it, besides fulfillment of one's promises, sacrifice and succession commitment.This category, furthermore, put under comparative survey sense of adjustment and various kinds of it.It intends in this way to show searching jurisprudence and whatever distinguished Imamiyyah jurists have left in their written works.