Orthodox canon law (and therefore Orthodox Churches)
do not allow or recognize divorce as such.
What actually
happens is that in some cases of divorce that has taken place (in spite of
every effort by the Church to prevent it), a party may after some time approach
the bishop and seek permission to obtain a penitential second marriage under
specific circumstances:
(1) The
innocent party who is the victim of adultery, according to Matthew 19:9 in
plain translation
(2) The innocent party who is the victim of another
absolute end of the marriage for other extraordinary reasons
(3) A party who has tried to save the marriage but at the
end of the process is able to convince the hierarch (bishop) that a second
marriage would be a safeguard toward salvation.
Remarriage is permitted up to three times in
Orthodoxy. Orthodox Christianity recognized that the unthinkable may sometimes
happen, and that the best approach is not to deny that there was a marriage in
the first place, but rather in some cases to recognize that a second
penitential marriage with reconciliation to the Church is better than the
alternative.
Source: http://www.orthodoxanswers.org/why-does-the-orthodox-church-allow-divorce-and-more-than-one-marriage-do-annulments-exist-in-orthodox-canon-law/
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