The Chatham House Rule is not a legal principle. If you violate it by recording a meeting in a one-party consent state, the most likely consequence is that you

The Chatham House Rule is not a legal principle. If you violate it by recording a meeting in a one-party consent state, the most likely consequence is that you wouldn’t be invited back. (Someone else posited legal consequences under contract law, but I’m not a lawyer.) And for the record, California is not the only two-party consent state. There are twelve others.