A recent California case may force companies doing business with foreign entities to reconsider—and maybe rewrite—their contracts. In Rockefeller Tech. Invs. (Asia) VII v. Changzhou Sinotype Tech. Co., No. B272170, 2018 WL 2455092 (Cal. App. June 1, 2018), the California Court of Appeal held that parties may not contract around the formal service requirements of the Convention on the Service Abroad of Judicial and Extrajudicial Documents, commonly referred to as the Hague Service Convention. The decision could have profound implications for international business.