4 .
Among non-Catholics there is a fair (or maybe unfair?) amount of misunderstanding regarding the Sacrament of Penance at the confessional. All but ONE of the following are at least broadly true: which is NOT?
When someone has confessed their sin/s, the priest will pronounce a formal prayer of Absolution and set a Penance (recommendation of good deeds to be done to confirm an improved attitude; or at least, several further prayers to be repeated)
Confession is permissible in three ways: privately (probably weekly, soon before Mass); occasionally at Parish Penance Services, such as during the penitential seasons of Advent and Lent; and rarely, through General Confession and Absolution in circumstances where individual penance is impracticable (e.g. during a major public emergency)
Confession of mortal sin is essential, and of venial (somewhat less serious) sins is encouraged; 'imperfect contrition' is when the sinner confesses out of fear of God's punishment, rather than from shame. It entails total secrecy: the priest who hears the confession, even of mortal sin, is bound never to divulge what he has heard, even to (for instance) the police who may be following up a serious crime
(Choose this Answer if you believe all the other three are true)