Forgiveness is a common contract and its basic factor is that owner can remove the decision of forgiveness every time, but there are some exceptions in this law. Some exceptions in this subject were indicated in cases 807-803 of civic law in Iran. For example, if the owner who forgive an asset was died, the reference is impossible. Although is forgiveness is related to father, mother, children or nephews, the reference is impossible. The most important point in this case is that wife is not included of the case. There are various methods for reference of forgiveness that examples of them are that forgiver can remove his/ her ownership from forgiveness asset or he/ she can change the asset. The other method is change the forgiveness in a way that the owner pays other asset equal to forgive asset, although it is not necessarily equality of forgive asset and its instead.
