How to kill a key (disable old key) for a motel room door:

  1. Make a key for the room that you want to disable
  2. Use “Check-In” feature to make a new key.
  3. Do NOT use “Duplicate” to make the new key.
  4. Take the key that you made and scan on the room door.
  5. Turn the handle and open the door.
  6. If steps 4 and 5 are not completed, the old key will still work.
  7. Make sure you shut the door after complete these procedures.