Washington Summons On A Third-Party Complaint is a legal document issued in the state of Washington that informs a third-party defendant that they are being sued in a civil case. The summons is typically issued after the plaintiff has filed a complaint with the court. The summons allows the court to have jurisdiction over the defendant, and informs them of their legal rights and obligations. There are two types of Washington Summons On A Third-Party Complaint: one for a complaint against an individual, and one for a complaint against a business. The summons must be served to the defendant within 90 days of filing the complaint, and the defendant must respond within a certain time frame or risk a default judgment.