On the first day of the Conference, the Donatists challenged the list of the signatures of the Catholic bishops on the document in which they had assigned their representatives. The roll call followed, in which the tribune Marcellinus, who presided, called the Catholic bishops one by one, and their Donatist counterparts were to identify them. Then the roll call proceeded in the opposite way, with the Donatist bishops identified by the Catholics.
The presence of the Donatists in Medianas Zabuniorum is contested by the Catholics. The Donatists leave the matter for further discussion. However, there is no Catholic bishop at the moment there. The bishop of neighbouring Sitifis said that he "has" a presbyter there, so he is probably a member of his clergy, although he was ordained specially for this occasion, after the death of the bishop of Medianas. The bishop of Sitifis promises that a new bishop will be ordained; it is unclear, whether it may be the presbyter who is actually serving there.