Cal. Food & Agric. Code § 62832

Every person that purchases English walnuts or almonds for purposes of processing or resale from any person, except a licensed dealer, broker, commission merchant, agricultural cooperative, or wholesaler, shall keep a record of the name and address of the person from whom each lot of such walnuts or almonds was purchased. If such walnuts or almonds are delivered to the purchaser by motor vehicle, the purchaser shall record either the license number of the vehicle or the driver’s license number of the person who makes delivery of each lot of such nuts.