Generally speaking, arbitration is a matter of contract, and arbitration agreements must be enforced according to their terms. The Ninth Circuit recently issued a caveat, however. In In re Wal-Mart Wage & Hour Employment Practices Litigation, No. 11-17718 (9th Cir. Dec. 17, 2013), an issue of first impression, the Ninth Circuit held that a non-appealability clause in an arbitration agreement that eliminates all federal court review of arbitration awards, including review under § 10 of the Federal Arbitration Act, is not enforceable. Federal court review of arbitration awards is already limited to the grounds enumerated in the FAA and to very limited circumstances in which an arbitrator manifestly disregards the law. Allowing parties to contractually eliminate all judicial review of arbitration awards, the court stated, would disregard the text of the FAA and take away the assurance of a minimum level of due process for the parties. This case shows that, while courts do strongly favor enforcing arbitration agreements according to their terms, there are still limits on the terms to which parties can agree.