The general rule is this: courts will not enforce illegal bargains. The parties are left where the court found them, and no relief is granted: it's a hands-off policy. The illegal agreement is void, and that a wrongdoer has benefited to the other's detriment does not matte
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An illegal agreement under the common law of contract, is one that the court will not enforce because the purpose of the agreement is to achieve an illegal end. The illegal end must result from performance of the contract itself. The classic example of such an agreement is a contract for murder.
