If you booked on another site and then book a cheaper rental from a rate we found, we let you take care of canceling your old reservation. We don’t know what arrangements you may have made for those reservations, so you’ll want to handle canceling any reservations you may have booked through other sites.
You'll see the following note on any offer pages we send to you:
“If you decide to take advantage of our offer, remember to cancel your old reservation by clicking here or canceling with the original website you booked at to ensure you receive the lower rate."
That reminds you that you'll want to take care of canceling your old reservation.