All rental cars also come with the minimum amount of insurance required by the state that you’re renting in, but rental car companies may also try to sell you on a collision damage/loss waiver, which transfers liability from you to the rental car company in the event of an accident. You can usually decline this if you have the coverage types listed above. If you only have liability coverage, however, you should consider purchasing enhanced coverage through the rental agency to make sure you and your partner are covered.