Ex dolo malo

EX DOLO MALO. Out of fraud or deceit. When a cause of action arises from fraud or deceit, it cannot be supported: Ex dolo malo, non oritur actio.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
The rule of pari delicto is expressed in the maxims 'ex dolo malo non eritur actio' and 'in pari delicto potior est conditio defedentis.' The law will not aid either party to an illegal agreement.