10. Ex turpi causa non oritur actio.
Cf. D. 47. 2. 12. 1: Nemo de improbitate sua consequitur actionem.
An agreement contrary to law or morals can give rise to no right of action in any party to it, either for the enforcement of it, or for the recovery of property parted with in pursuance of it. Cf. the maxim: In pari delicto potior est conditio defendentis. See § 124.