in hotels, if you lose your room key card, how are they able to reprogram the new one so it works and the old one doesn’t?

Question

Is there some system that transmits information to your door card reader on what the new key is, or is it something different entirely?

In: 1028

Answer 1

Currently working in a hotel. Front Desk make you a new key, you bring it in and insert/ swipe the lock.
Lock is now only remember the new key, old key is forgotten. FD can make as many duplicates of the new key as they wish.
Keys can be programmed to expired on the check out date, or certain rooms/ floors, etc