I have a Catholic church who married a protestant in the church, and then formally joined the protestant church. She was baptized, first communion, confirmed in the Catholic Church. If she wants to rejoin the Catholic church, does she have to do R.C.I.A.? Or is she still considered Catholic although she made a profession of faith to a different denomination because once a Catholic always a Catholic?
What if a baptized, communioned, and confirmed Catholic leaves the church and becomes a Muslim? Is the answer the same?