Under California state law, a car accident that occurs in a parking lot is subjected to the same legal processes as a car accident that occurs on the road. If you are involved in a parking lot collision, you should still report the accident and provide your contact information to the other driver. You will need to negotiate with the other driver’s insurance company to determine fault and allocate coverage. California is an at-fault state, so the insurance provider of whoever caused the accident should be liable for the damages.