Legal Question in Employment Law in California

There is no law preventing audio, video or other monitoring of company premises or of company communications like phone and computers, nor is there any law requiring 'notice' of doing so, except as to phone calls involving customers or other non-employees. That's why you hear the 'may be recorded or monitored notice' on some phone announcements. However, the safest course of action is for companies to give minimal basic warning to employees of such potential, such as a statement in the employee handbook or policy manual, posting on the company newsletter, info board or website, an initial memo to employees, etc. That should be done to avoid people claiming 'invasion of privacy', even though employee privacy does not exist on the job, except in bathrooms or changing rooms.