Your client is sued for failure to pay on a contract and says it shouldn’t have to pay because the prices were fixed by a cartel or that it was strong-armed into paying for a “bundle” of services or distribution channels even though it only wanted a subset of the bundle. Is that a defense? After all, aren’t contracts for unlawful ends unenforceable?

The answer, most often, is “no.” A recent decision by a New York Commercial Division judge provides a useful reminder of the fairly limited allowance of antitrust defenses to contract claims.