Evil customs
Evil customs (Catalan: mals usos, lit. "bad uses") were specific medieval feudal customs, generally levies, which peasants were subjected to by their feudal lords in the Crown of Aragon and other European countries. These obligations are related to the Ius Maletractandi, a right approved by the Catalan Court of 1358, which empowered the feudal lords to treat their people in ways later considered unjust.