Check-in is the process of announcing your arrival at a hotel, airport or sea port.
Check-in desks are found in the majority of commercial airports
. Their main function is to take in luggage that passengers wish to, or are required to, place within the aircraft's cargo
hold. However, there is an increasing trend towards more automated check-in processes, with many passengers now able to either check-in online before arriving at the airport (often several days before their flight), or use an airline's self-service check-in kiosks at the airport, to avoid queues for the main, staffed, check-in desks. After the luggage is weighed and tagged it is placed on a conveyor which usually feeds into the main baggage handling system.
At hotels, Check-in is normally required in order to obtain a room key
and provide a credit card guarantee
to cover potential costs such as Room Service
for the duration of the stay.