Washington Notice of Proposed Arbitrators (WPA) is a document issued by a court when an arbitration is requested or required. The document includes the names of the proposed arbitrators and other necessary information for the arbitration process. The document is usually issued by the court in the state of Washington, but it can also be used in other states. There are two types of Washington Notice of Proposed Arbitrators: voluntary and mandatory. A voluntary WPA is issued when the parties to the dispute agree to arbitration and submit a request to the court. In a mandatory WPA, the court issues the document on its own initiative based on the facts of the dispute. The Washington Notice of Proposed Arbitrators includes the names of the proposed arbitrators, the date of the hearing, the name of the court, the location of the hearing, and other information about the arbitration process. All parties to the dispute must sign the document before it can be submitted to the court.