As a Greek Orthodox may I receive the sacrament of Holy Communion in a Catholic Church. Do you know the rules regarding Greek Orthodox and Catholic relations? I live in an area where the closest church is a Roman Catholic Church. Does the Catholic Church recognize us as equals?
Orthodox Christians are not permitted to receive Communion in non-Orthodox communities, including the Roman Catholic. To do so would imply a unity that in fact does not yet exist. Also it implies that we are “united” to the faith community from which we receive the Eucharist.
In brief, while Roman Catholicism sees Orthodoxy as a “sister church”, Orthodoxy sees herself as the fullness of the Church, not the “other half” of the Church, as implied in the notion of a “sister church.”