Originally Posted by
Mattress_Runner
You have to have the credit card to do this. When you get the credit card, the system knows you are qualified. So when you login and make a reservation for AT LEAST THREE DAYS, your third day will be free. I did it for a stay in Madrid a few months ago and it worked fine. In fact, I had to extend my stay another three days so it worked twice.
Unless the policy has been changed recently you are incorrect.
A credit card holder gets the final night of an award gratis, it doesn't matter whether 2 or 17 nights have been booked.
The minimum is 2 nights, not three.