If you are involved in an auto collision a parking lot with person driving rented car whose insurance provider is liable the rental owner or renter?

The person who was driving the rented car is liable for any damage caused to your car. They are the ones responsible for the car while they are driving it. The rental car owner is not liable unless they were also driving the car at the time of the collision.

The renter's insurance will likely cover the damages, but you may have to file a claim with your insurance company as well. If the person who was driving the rented car does not have insurance, or if their insurance does not cover the damage, you may be able to sue them for compensation.