# Contract The formalization of a mutually beneficial relationship among or between two or more parties. Issues to look out for: - Was there mutual assent? - Was there a mutual exchange of [[consideration]]? A completely one sided agreement is generally unenforceable, but there are exceptions (e.g., [[promissory estoppel]], or a [[promissory note]]). - Was there an [[integration clause]] contained within a written agreement? If not, other evidence outside of the written agreement may be introduced if a dispute arises.