Washington Notice of Proposed Arbitrator (WPA) is a required document in the state of Washington when parties are entering into a binding arbitration agreement. In Washington, the WPA must be filed with the court before any arbitration proceedings can begin. The WPA is a document that outlines the names of the proposed arbitrators and their qualifications. The purpose of the WPA is to ensure that the arbitrators chosen are qualified to handle the particular dispute between the parties. There are two types of Washington Notice of Proposed Arbitrators: (1) individual and (2) panel. An individual WPA is used when there is only one arbitrator chosen to hear the dispute. A panel WPA is used when there are more than one arbitrator chosen to hear the dispute. The panel WPA must list all the proposed arbitrators and their qualifications. The WPA must also include the method by which the arbitrators will be selected from the list provided. The Washington Notice of Proposed Arbitrator must be signed by each party involved in the arbitration and filed with the court. Once the WPA is approved, the arbitration process can begin.