What happens if I hire a car in London, but take it into the congestion charge zone?

What happens if I hire a car in London, but take it into the congestion charge zone?

A:

In order to make your journey as hassle-free as possible, we have registered the car with the Autopay facility, so if your trip takes you into the congestion zone, you don’t need to pay the charge during your trip. Instead, you will be billed for this by ourselves, once we receive notification from Transport for London.