I have a frum employee that when I am not in the office he leaves without signing out. His wife is forever calling him and is very needy. I have confronted him more then once that I have SEEN him driving so I KNOW he left and he makes some excuse like oh that was literally 5 minutes, I just ran home to get lunch etc…. I do not pay for the car. I am going out of town on Tuesday and want to know if I am halachically allowed to put GPS tracker on his car to see if he leaves the office between 9 and 5. I am paying him for those 8 hours and want to make sure he’s there working.
You may put video cameras in your office but you should not put the GPS in his car. Since it is his property, it would be a violation of his privacy.
Horav Y. Berkowitz shlit”a