Can mortal sins be forgiven without confessing?

Sacramental confession is normatively required for the forgiveness of mortal sins; it is not absolutely required. What this means is that, in extraordinary circumstances, mortal sins can be forgiven outside of sacramental confession. If a Catholic is dying and cannot go to sacramental confession, his mortal sins may be forgiven if he repents with true contrition (i.e., sorrow for sin) and has at least the implicit intention to go to sacramental confession if the opportunity is made available.