How would the hotel know that you are not actually staying there? Has someone told them?
I'm not sure they would. My girlfriend checked in under our reservation, which I booked with my Hyatt # and credit card. She checked in today and did have to show them her credit card. I'm just not sure if they change something in the system showing that I'm not there. How soon do elite nights post to a membership account? I suppose I can check in the next 1-2 days and see if 1-2 nights get credited to my account.