California Code, Evidence Code - EVID § 1120

(1) The admissibility of an agreement to mediate a dispute.

(2) The effect of an agreement not to take a default or an agreement to extend the time within which to act or refrain from acting in a pending civil action.

(3) Disclosure of the mere fact that a mediator has served, is serving, will serve, or was contacted about serving as a mediator in a dispute.

(4) The admissibility of declarations of disclosure required by Sections 2104 and 2105 of the Family Code, even if prepared for the purpose of, in the course of, or pursuant to, a mediation or a mediation consultation.