​​You can hire “shopping investigators” to test employ​ees’ integrity and review sales techniques and service.​

Before discharging or disciplining an employee on the basis of a shopping investigator’s report, you must provide the employee with a copy of the report. During an interview that might result in terminating an employee for dishonesty, you must give the employee a copy of the latest investigation report on which the interview was based. You are excused from these requirements if the shopping investigator is employed exclusively and regularly by you and the entire investigation is conducted solely for you.1


1.Lab. Code sec. 2930​