The moral influence has an impact on the will of the party affected by the moral influence, and thus one party to the contract has authority over the other party. It differs from the rest of the defects of will in that moral influence requires the existence of a relationship between the party affected by the moral influence and the holder of the authority. Without the presence of this authority, it is not considered a defect. Of the defects of will.Contracts concluded in the presence of moral influence create an imbalance between the parties to the contract, as one party is in a stronger moral position than the other. This pushes the person affected by the moral influence to agree to a contract that would not have been concluded without the presence of moral influence, or to agree to arbitrary terms in the contract that would not have been possible. He agrees if there is no moral influence, which makes the acceptance of the party affected by the influence under influence that makes him not free in his action.Some civil laws consider moral influence to be coercive if it is combined with coercive means, and some of them consider it a case of defective exploitation
Khadr et al. (Sun,) studied this question.