Acts of reparation

Reparation is a theological concept closely connected with those of atonement and satisfaction. In ascetical theology, reparation is the making of amends for insults given to God through sin, either one’s own or another’s. The response of man is to be reparation through adoration, prayer, and sacrifice. In Roman Catholic tradition, an Act of Reparation is a prayer or devotion with the intent to expiate the "sins of others", e.g. for the repair of the sin of blasphemy, the sufferings of Jesus Christ or as Acts of Reparation to the Virgin Mary.

In the encyclical Miserentissimus Redemptor Pope Pius XI said:

According to Thomas Slater, reparation is a theological concept closely connected with those of atonement and satisfaction, and is considered a sacred mystery in Roman Catholicism. It is the teaching of that faith that man is a creature who has fallen from an original state of grace in which he was created, and that through the incarnation, Passion, and death of Jesus Christ, he has been redeemed and restored again in a certain degree to the original condition. Although God might have condoned men's offences gratuitously if He had chosen to do so, yet in divine providence He did not do this; He judged it better to demand satisfaction for the injuries which man had done Him. It is better for man's education that wrongdoing on his part should entail the necessity of making satisfaction. This satisfaction was made adequately to God by the suffering, passion, and death of Jesus Christ, made Man for us. By voluntary submission to His passion and death on the cross, Jesus Christ atoned for man's disobedience and sin. He thus made reparation to the offended majesty of God for the outrages which the Creator so constantly suffers at the hands of His creatures.

...
Wikipedia