A closed-communion church is one that (perhaps with exceptions in unusual circumstances) excludes non-members from receiving communion. This is the practice of all churches dating from before the Protestant Reformation and also of some Protestant church such as some Lutherans and Baptists. Non ELCA Lutherans in the U.S. require catechetical instruction for all people, even members from other Lutheran Churches, before receiving the Eucharist while some Baptist churches require part membership while others even require full membership before participating in the communion service.