Good will has a complex concept .In Egyptian law, Egypt's Civil Code stipulates in good will in the execution of the contract. In the part that is related to contract associated primarily civil law Egypt's other works to the good or bad faith . In Iranian law, although different rules are based on some provisions required to comply in good will in the performance of the contract. But accepting it as a rule of thumb is doubtful. In this paper, it has been discussed the status of good will in the perspective of law enforcement contract in Egypt, France and Iran .