Washington Proof of Personal Service is a form of service of process used in the state of Washington. It is a document that serves as tangible proof that a defendant has been served with legal documents such as a summons or complaint. The Proof of Personal Service form must be signed by the server and notarized. There are three types of Washington Proof of Personal Service: 1) proof of personal service on an individual, 2) proof of personal service on a business or other entity, and 3) proof of substituted service. When serving an individual, the server must hand-deliver the documents to the defendant and have the defendant sign the Proof of Service form. If the defendant refuses to sign, the server must note this on the form. When serving a business or other entity, the server must hand-deliver the documents to a person authorized to accept service on behalf of the entity. The authorized individual must then sign the form. For substituted service, the server must provide the documents to someone of suitable age and discretion at the defendant’s residence or place of business. The server must then mail a copy of the documents to the defendant’s last known address and have the Proof of Service form notarized.