Prof. Dr. Klaus Peter Berger, LL.M.transnational lawtransnational law (lex mercatoria or international business law) and "No restitution in case of knowledge of illegality of performance"2016-03-01 13:58:16https://www.trans-lex.org/img/logo_ball.png
This Principle follows from the general Principle of good faith. A party who positively knows that its performance is illegal may not later claim restitution of that performance. Doubts as to the illegality of the performance do not suffice unless the party who performs makes it clear that it assumes all risks arising out of that performance.
Please cite as: "Commentary to Trans-Lex Principle , https://www.trans-lex.org/960000"