During Lent, our parish will hold a Penitential service. Usually there are prayers, a reflection by either a priest or a deacon, time for people to do an examination of conscience, perhaps even a time for prayers of contrition but what is necessary is individual confession. And as many as 6 priests will be present to hear individual confession and give absolution.There is no such thing allowed in the church like general absolution…which is what I believe you are referring to. In our diocese, parishes would like to do this, but canon law says, the only time, general absolution would be allowed is in time of war when a whole platoon is going into battle, then general absolution may be permitted. For sins to be absolved, individual and private confession of your sins particular mortal or grave sins must be said before a priest in order for them to be forgiven and for you to receive your penance.