Food and Agricultural Code § 56331

(a) Every licensee operating as a broker, upon negotiating the sale of farm products, shall issue to both buyer and seller a written memorandum of sale, before the close of the next business day, showing price, date of delivery, quality, and all other details concerned in the transaction.

(b) The memorandum required by subdivision (a) shall have an individual identifying number printed upon it. The numbers shall be organized and printed on the memoranda so that each memorandum can be identified and accounted for sequentially. Unused or damaged memoranda shall be retained by the broker for accounting purposes.