If you hit a vehicle that is unattended, you should first notify the police. They will let you know if they need to be present to write an accident report. After that, under one of the windshield wipers, leave a sheet of paper with the following information on it: your name, your address, your phone number, your insurance company's name, and your insurance company's claim phone number. You should then promptly notify your insurance company. (Failure to prompty notify your insurance company may jeopardize your insurance coverage.
If this claim increases your insurance premiums, you can click here to get a quote for an auto insurance rate comparison.