I would like to start a discussion between Roman Catholics, Eastern Orthodox and Anglicans regarding the perceived validity of the Eucharist in those denominations. Why, for example, do the Roman Catholics believe that the Anglican sacrament is not valid? And why does receiving Holy Communion in an Anglican Church result in ex-communication by the Roman Catholic Church of a baptised Catholic? On the other hand, if a baptised Roman Catholic receives Holy Communion in an Eastern Orthodox Church, they are not ex-communicated. Why is that? Also, why do the Eastern Orthodox not allow Roman Catholics to receive Holy Communion? What is the EO view of the Roman Catholic sacrament?