Restitution is the act of restoring anything to its rightful owner; act of giving an equivalent for loss or damage. Restitution makes a person pay back just debts, restore stolen or misappropriated articles, uncover his crimes and confess his lies. This is to be done whether the person injured knew it or not- God knows.
Note: Restitution that would implicate others or bring injury or harm to others, needs care and God’s wisdom.
In such cases, it is necessary to seek counseling from a faithful, experienced, competent, matured Christian teacher and preacher (who, of course, believes and teaches “the whole counsel of God”).