California Code, Labor Code - LAB § 2930

(a) Any employer who disciplines or discharges an employee on the basis ofa shopping investigator's report of the employee's conduct, performance, or honesty performed by a person licensed pursuant to Chapter 11 (commencing with Section 7500) of Division 3 of the Business and Professions Code shall provide the employee with a copy of the investigation report prior to discharging or disciplining the employee. Where an interview occurs which might result in the termination of an employee for dishonesty, the employee shall be handed a copy of the latest investigation report on which the interview was based during the course of the interview prior to its conclusion. This section shall not be applicable if the licensee conducting the investigation is employed exclusively and regularly by one employer in connection with the affairs of only that employer and where there exists an employer-employee relationship and the entire investigation is conducted solely for such employer by such licensee.

(b) For purposes of this section, a “shopping investigator” is a person who: shops in commercial, retail, and service establishments to test integrity of sales, warehouse, stockroom, and service personnel, and evaluates sales techniques and services rendered customers; reviews an establishment's policies and standards to ascertain employee performance requirements; buys merchandise, orders food, or utilizes services to evaluate sales technique and courtesy of employees, carries merchandise to check stand or sales counter and observes employees during sales transaction to detect irregularities in listing or calling prices, itemizing merchandise, or handling cash; or delivers purchases to an agency conducting shopping investigation service; and, following any one or more of the above activities, writes a report of investigations for each establishment visited.