Full communion
In Christian ecclesiology, full communion is a relationship between church organizations, groups, and individuals that mutually recognize their sharing the essential doctrines of Christianity and "are able to recognize in one another the one, holy, catholic and apostolic church in its fullness". Thus a profession of faith is required of people wishing to enter into full communion with the Catholic Church, even if they have been members of a separate church whose sacraments the Catholic Church considers to be valid. Being "in full communion with the Catholic Church" is incompatible with denying what it has definitively proposed as its teaching on faith and morals.