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

So how it works is every card is blank. Once u check into a room the card is encoded with the date and the data needed to open the door. When swiping in it checks both to see if it matchs up. They sometime encode other data but mostly just that.

When u lose the key hotels DO NOT re-encode a new card with the same data. The reason being if someone took the key they would be able to enter your room. They ALWAYS re encode a new code to the locks and key. Even a single key they will re code the door and no old key will work even the ones u have.