Cal. PROB § 19004

If the trustee files, publishes, and serves notice as set forth in Section 19003, then: (a) All claims against the trust shall be filed in the manner and within the time provided in this part. (b) A claim that is not filed as provided in this part is barred from collection from trust assets. (c) The holder of a claim may not maintain an action on the claim against the trust unless the claim is first filed as provided in this part.