The defendant in a lawsuit must be served (delivered) a summons or citation (an order from the court to appear and answer the lawsuit) and a copy of the lawsuit (1) to provide due process (fairness) by giving the defendant notice of the lawsuit and the opportunity to appear in court and defend the lawsuit; and (2) to give the court personal jurisdiction (authority) over the defendant.
In Washington State, the process of serving a defendant with a summons or citation, along with a copy of the lawsuit, is a critical step in the legal process. This procedure ensures due process by officially notifying the defendant of the lawsuit and granting them the opportunity to appear in court to defend themselves. Additionally, it establishes the court's personal jurisdiction over the defendant. The service must be performed in a manner prescribed by the Washington court rules, which typically includes personal service, service by mail with acknowledgment, or by publication if the defendant cannot be located. The rules for service of process are detailed in the Washington State Court Rules, specifically in the Civil Rules (CR) under CR 4. Failure to properly serve a defendant can result in delays or dismissal of the lawsuit.