Learn how arbitration can resolve certain disputes out of the court. Instead of a judge, impartial arbitrators make the legal decision.You should have a copy of the Divorce Petition and any Response handy when filling out this form. I'm going to talk you through a couple of basic elements or questions about arbitration. I'm going to try to give you a general overview of what it is. Welcome to Washington State Courts. They can provide samples of agreements and other information and, in some cases, help with mediation. Family Court Services. A Separation Agreement establishes the terms of a marriage separation. Use our free, simple template to divide your assets and duties with your spouse.