The program is mandatory because a lawyer is required participate if a client files a Client Request to Arbitrate. In arbitration, each side in the dispute presents its case, including evidence, to the arbitrator.If a client requests arbitration through the Mandatory Fee Arbitration program, it is required for the attorney. Q.Must I have a lawyer represent me in arbitration or mediation? A: It is not required, however it is preferable. ATTACH ALL DOCUMENTS SPECIFICALLY REQUESTED IN THE FORM if you have them (e.g. JAMS Sacramento Mediation, Arbitration and ADR Services. 1415 L Street, Suite 700, Sacramento, CA 95814. 916-921-5300. All prospective mediator panelists must fill out an online questionnaire, or downloaded a paper version in Word or PDF format. Sacramento County Public Law Library Resources.