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False. In ideology once you have been baptised you are always a member of Mother Church wether you like it or not. Even if you decide to become Muslim, the Church still conciders you Catholic. Catholosism isn't just for Christmas, it's for life, even if you convert

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A person can excommunicate themselves or be excommunicated from membership in the Church by committing certain particularly grave sins.[151][152] Examples include violating the seal of confession (committed when a priest discloses the sins heard in the sacrament of Penance), persisting in heresy, creating schism, becoming an apostate, or having an abortion.[153] Throwing away the sacramental bread and wine received during the Eucharist or taking or retaining them for a sacrilegious purpose are also considered excommunicable offenses.[154] Excommunication is the most severe ecclesiastical penalty because it prevents a person from validly receiving any church sacrament. It can only be forgiven by the pope, the bishop of the diocese where the person resides, or priests authorized by him.[155] Among those who have been excommunicated or incurred excommunication are Arius, Henry VIII, Elizabeth I and members of the group Womenpriests.[156]

Roman Catholic Church - Wikipedia, the free encyclopedia