The sealing of the Holy Spirit in Confirmation is the final sacrament of initiation into the Catholic Church. If, for some reason, you have not received this powerful sacrament, we encourage you to do so! Once each year Adult Confirmation preparation is offered for Catholics at least 18 years of age, graduated from high school, already been baptized, received first Eucharist, actively practicing their faith, and if married, marriage must be sacramental in the Catholic Church.