The Canons of the Synods of Sardica, Carthage, Constantinople, and Carthage Under St. Cyprian, Which Canons Were Received by the Council in Trullo and Ratified by II. Nice 112Canon LXXXIX.

Greek xcii. That bishops who are ordained shall receive letters from their ordainers bearing the date and the name of the consul.

It further seemed good that whoever thereafter should be ordained by the bishops throughout the African provinces, should receive from their ordainers letters, written in their own hands, containing the name of the consul and the date, that no altercation might arise concerning which were ordained first and which afterwards.