Samuel Nelson, McBlair v. Gibbes — Opinion of the Court
“ In consequence of the illegality the contract was invalid, and incapable of being enforced in a court of justice. The fulfilment depended altogether upon the voluntary act of Mina, or of those representing him.No obligation existed, except what arose from a sense of honor on the part of those deriving a benefit from the transaction out of which it arose. Its value rested upon this ground, and this alone. The demand was simply a debt of honor. But if the party who might set up the illegality chooses to waive it, and pay the money, he cannot afterwards reclaim it. ”
