While you can leave your keys in the room and simply walk out, it is generally better to officially check out at the front desk or use the hotel’s mobile app. Leaving keys in the room prevents the hotel from immediately knowing that you have vacated, which can delay the housekeeping staff from preparing the room for the next guest. By stopping at the desk, you can quickly review your final bill for any "phantom" minibar charges or errors, ensuring there are no surprises on your credit card statement later. In 2026, many modern hotels use RFID key cards that automatically deactivate at checkout time, making them useless as "keys" after you leave. If the hotel has a "key drop box," that is the preferred method for a quick departure. Some boutique hotels still use physical brass keys; in those cases, you must return them to the desk, as the hotel will charge a significant "lost key" fee (often $50-$100) if you take it home or leave it in an unmonitored location.