Washington Notice of Arbitration Hearing Date is a document sent by an arbitrator to the parties involved in an arbitration proceeding. This document informs the parties involved in the arbitration hearing of the date and time of the hearing. The document will also include the names of the arbitrators, the address of the hearing, and any other relevant information. There are two types of Washington Notice of Arbitration Hearing Date: one for arbitration in Washington state, and one for arbitration in the District of Columbia. The Washington State Notice of Arbitration Hearing Date informs the parties of the arbitration hearing taking place in Washington State. The District of Columbia Notice of Arbitration Hearing Date informs the parties of the arbitration hearing taking place in the District of Columbia.