Cal. Food & Agric. Code § 61407

If a handler fails to pay any producer or producers in the manner that is required by this chapter, the director shall proceed forthwith to ascertain the names and addresses of all the producers that the handler has failed to pay, together with the amounts due and owing to them and each of them by the handler, and shall request all of those producers to file a verified statement of their respective claims with the director. The producer need only verify that he or she is owed an amount by the handler. The actual amount in that case may be ascertained by the director.