If you don't want to take your time and money to go to the police station to make a formal report, donu2019t do it. There will be a call card in their system that someone reported the incident. If they don't care enough to take a phone report or to send an officer to you, then you are not obligated to go to them. If you didn't see the person who did it, it is not likely to make much difference in finding them. The person who is the victim will still be claiming on their insurance or paying for repairs out of pocket.