EX TURPI CAUSA NON ORITUR ACTIO

Latin: "Of an illegal cause there can be no lawsuit." In other words, if one is engaged in illegal activity, one cannot sue another for damages that arose out of that illegal activity. A example is an injury suffered by a passenger in a stolen car, which that passenger knew to be stolen and was a free participant in the joyriding. If vehicle crashes injuring the passenger, there is no action in tort against the driver under the ex turpi causa non oritur actio principle.