Hiring a private investigator is authorized, and you cannot sue someone for using the services of just one to receive information on you. However, if there happen to be cases of invasion of private Area, harassment, or intimidation, you could sue each the PI and the client for damages incurred. https://hire-a-private-investigat76554.blogoscience.com/35185092/not-known-factual-statements-about-hire-a-private-investigator-dc