==Churches "in resistance"==
These churches refrain from [[concelebration]] with the mainstream Orthodox churches, but do not consider themselves schismatic[[schism]]atic, nor have they declared a break in [[full communion|communion]] with the mainstream churches. They will also commune the faithful of those churches.
* [[Holy Synod in Resistance]]("Cyprianites")
* [[Old Calendar Orthodox Church of Romania]]
* [[Old Calendar Orthodox Church of Bulgaria]]
==Churches which are "walled off"==
These churches refrain from both [[concelebration]] and [[full communion|communion]] with the mainstream Orthodox churches, regarding those mainstream churches to have apostasized and placed themselves outside Orthodoxy.
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