I stand corrected:
“In Eastern Orthodoxy, doctrine does not state that the priesthood confers an indelible character on the person’s soul. Laicization removes the ordained status completely. All sacred actions of a former clergyman are normally considered invalid (beginning from the time of laicization).”
“In Roman Catholicism, a laicized priest is forbidden to exercise his priestly functions, but an indelible priestly character is held to remain on his soul (or to put it simply, “once a priest, always a priest”). Consequently, any exercise of his sacramental powers is considered valid even though illegal because he has been laicized. (In fact, in the case of danger of life, a laicized priest must give the Last Rites or at least absolve the dying.)”
(Wikipedia)
So Orthodox think they can un-do holy orders like they do marriage. We disagree. Of course the Catholic Church, being guided into all truth by the Holy Spirit, with “Peter” at the helm, is right, while the many sects of Orthodoxy, being led by fallible men, are wrong. This is a perfect example of why you need the Pope and the Magisterium.