The arbitration of claims can take several different forms in Pennsylvania, but can be generally categorized as either compulsory judicial arbitration. In the event a grievance cannot be resolved, some labor contracts allow for arbitration to settle the grievance.Cases must be filed in the Office of the Prothonotary. What is Arbitration? Both parties must voluntarily agree to mediate. If the agreement to arbitrate prescribes a method of appointment of arbitrators, the prescribed method shall be followed. Pennsylvania recently adopted the Family Law Arbitration Act (FLAA), which became law on July 7, 2024.