Canon 11
That a powerful person who robbed someone and after the admonition of a bishop did not give back what he grabbed shall be excommunicated
If someone powerful robbed a cleric, or a poor, or a monk, and a bishop summoned him to his court, and he ignored it, a letter should be composed immediately and sent to all the bishops of the province and to anyone who could hear it, that the thief would be excommunicated unless he is judged by a bishop and gives back what he has stolen.
(trans. M. Szada)