For Catholics, full initiation consists of baptism, confirmation, and Eucharist. Catholics who have only been baptized need to complete their initiation by celebrating the other two sacraments. For many other Christians, baptism alone is considered to be full initiation. However, Roman Catholics believe that even though other Christians are initiated into Christ, they are not in full communion with the Roman Catholic Church. So they are received into full communion when they decide to become Catholic. Their reception is celebrated with the sacraments of confirmation (usually) and Eucharist.
Posted in: Baptized candidates