I'm hotdesking not in my usual office. Its quite large here so not realistic to go around asking everyone whos that car is. No one I've asked knows who's car it is. Only way I can think is to email everyone in the organisation to reach the owner to move it. Its been parked there since 9, I couldn't use the car to go and do some shopping at lunch and pissed off about that but to stop me leaving on time on Friday would get me raging.