One needs to understand who is actually presiding over the baptism; if it is done in the Trinity, it is the Godhead who is baptizing the individual. When one considers the implications of Rome Apostate organization and it’s unfaithfulness of it’s leaders, contrast this idea against the chances that how many people in an orthodox setting have had the sign placed upon them by unregenerate, even reprobate ministers. The effectual nature to baptism must never be dependent upon the faithfulness of the minister of the gospel-at least in the absolute sense.

http://www.semperreformanda.com/?s=rebaptism