What kind of "private revelations?" How are they received? Under what circumstances?
AFAIK, in the Orthodox Church, we don't really have private revelations. The primary revelation of God was public, seen and known by many trustworthy witnesses and held in common. It makes up holy tradition--that which has been received from Christ God, his apostles, and their successors, that which has been confirmed constantly. If someone were to receive something privately, it would be held up against this, and if found wanting, discarded as deception. However, if it is found to be in line with truth, it is added--such are the teachings of the saints, the witness of their lives, etc. Then it no longer remains private, but becomes part of the common tradition. This is my understanding at least.