I would like to start a discussion in regards to the Sacrament of Last Rites…
If one is on their death bed and has unconfessed mortal sin yet receives this sacrament - what is the outcome and or the teaching of the Church?
First, it’s “Anointing of the Sick”, not “Last Rites.”
Last Rites is a popular term for the sacrament, but not the most theologically correct one. It leads people to the (false) conclusion that this sacrament is only for those on their death bed.
In any case, the clear preference of the Church is that someone who is dying receive Reconciliation, Anointing of the Sick, and the Eucharist (
Viaticum), in that order. As Baptism, Confirmation and Eucharist are the three sacraments that welcome us into the life of the Church, these three sacraments prepare us to be welcomed into our heavenly home.
Of course, this is not always possible. Sometimes, a person’s health does not afford them the ability to make a verbal confession and receive the Sacrament of Reconciliation. In these cases, it’s about what the person would do if they were conscious. Forgiveness of sins
is one of the effects of Anointing of the Sick, but we cannot be forgiven if we are not repentant (just as a verbal Confession also would not be efficacious if we were unrepentant).
However, we need to be careful about using this to make judgment calls in particular cases. Even someone that
appears to us to be unrepentant may be repentant if they really understood the sin they have committed. So we can’t assume that a sacrament has not been efficacious.
For more information, look at what the Catechism of the Catholic Church says about Anointing of the Sick:
CCC 1499-1532