311. Can this sacrament be celebrated in some cases with a general confession and general absolution?In cases of serious necessity (as in imminent danger of death) recourse may be had to be a communal celebration of Reconciliation with general confession and general absolution, as long as the norms of the Church are observed and there is the intention of individually confessing one's grave sins in due time.
Further reading: CCC 1480-1484312.What are indulgences?
Indulgences are the remission before God of the temporal punishment due to sins whose guilt has already been forgiven. The faithful Christian who is duly disposed gains the indulgence under prescribed conditions for either himself or the departed. Indulgences are granted through the ministry of the Church which, as the dispenser of the grace of redemption, distributes the treasury of the merits of Christ and the Saints.
Further reading: CCC 1471-1479 , 1498