Orthodoxy is divided on whether to baptize converts who were baptized by heretics under the Trinitarian formula. Some groups baptize them; some groups only require chrismation. Which groups accept the baptism of heretics and only require chrismation?
Secondary Question (not necessary for the answer):
From my understanding, the split can be divided on Old Calendar, anti-Ecumenical vs. New Calendar, pro-Ecumenical grounds. Churches adhering to the New Calendar will accept heretical converts via chrismation, but not baptism; churches adhering to the Old Calendar will accept heretical converts via baptism (and then chrismation).
Is this an incorrect way to categorize the question --- I would be very interested in examples of either Old Calendarists/anti-Ecumenists who accept heretical converts via chrismation and of New Calendarists/pro-Ecumenists who accept heretical converts via baptism. EDIT -- I was informed today that there is a monastary under the authority of Constantinople (New Calendar/pro-Ecumenical) in my area that baptizes heretical converts (in opposition to those who they are under the authority of). While I found it interesting, I would prefer examples of churches, not monasteries, for purposes of this secondary question.