A Practice Note explaining factors a solo arbitrator or tribunal chairperson should consider when presiding over a domestic US arbitration under the rules of the American Arbitration Association (AAA), JAMS, the Financial Industry Regulatory Authority (FINRA), or the International Institute for Conflict Prevention and Resolution (CPR) where a party is not represented by counsel. This Note explains the challenges the arbitrator faces when dealing with an unrepresented party and describes the steps the arbitrator may take to ensure the arbitral proceeding is efficient and fair to all parties.