The emphasis of the verses and narrations on justice and its placement in the chain of causes of rulings and the attention of jurists to justice in jurisprudential conclusions and the possibility of understanding and identifying its examples by reason and custom show that justice can be used as an arbiter in conflict situations. Traditions, laws, fatwas and judicial opinions play a role.

The legislator's special attention to legal justice in the constitution expresses justice as the main basis and goal of legal rules and regulations. Therefore, in cases where the existence of abstract or silence or conflict of law makes the interpretation of the law unavoidable, authentic Islamic sources and valid jurisprudential fatwas are used as compensating for the shortcomings of the law. that justice can play a decisive role in adopting an authentic source or an authentic fatwa in order to eliminate the defects of the law, and the reason for the fatwa that provides justice is preferable.

In the field of family law, we are witnessing the conflict of judicial opinions, the root of which is silence, conflict, summaries of the law, and differences in sources and Islamic fatwas. Such as: the conflict of the Amara Farash with the DNA test, the extension of the defects of the license for annulment of marriage to the right of annulment with the lack of extension of the defects of the license of annulment of marriage to the right of annulment, the necessity of the permission of a virgin virgin daughter from the guardian in marriage with the absence of the necessity of the permission of a virgin daughter of the guardian in Marriage, the wife's inheritance from the immovable property of the deceased husband and the wife's inheritance from the immovable property of the deceased husband, which justice can be an advantage for preferring a fatwa over another fatwa in this field.