I. Theodorus should not have approached him except through his metropolitan.
Your first proceeding, when anxious, should have been to have consulted your metropolitan on the point which seemed to need inquiry, and if he too was unable to help you, beloved, you should both have asked to be instructed (by us); for in matters, which concern all the Lord's priests as a whole, no inquiry ought to be made without the primates. But in order that the consulter's doubts may in any case be set at rest, I will not keep back the Church's rules about the state of penitents.
Source: Letters (New Advent)