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 Oklahoma, as in all states, a defendant in a lawsuit must be properly served with a summons or citation and a copy of the lawsuit. This requirement is fundamental to the legal process as it ensures due process by notifying the defendant of the legal action against them and granting them the opportunity to appear in court to defend themselves. The service of process must be carried out in accordance with Oklahoma state statutes, which outline the acceptable methods of service, such as personal delivery to the defendant, leaving the documents with an adult member of the defendant's household, or by mail, among other methods. Proper service is also necessary for the court to establish personal jurisdiction over the defendant, which is the court's authority to make legal decisions affecting the defendant. If a defendant is not served correctly, they may challenge the court's jurisdiction, and the case may be dismissed or the service may have to be completed again.