Check-in procedures are the steps travelers follow to confirm their arrival at a location, such as an airport or hotel. At an airport, this typically involves presenting identification and a ticket at the check-in counter or using a self-service kiosk. Travelers may also need to check in their luggage during this process. In a hotel, check-in procedures usually require guests to provide identification and a reservation confirmation. Guests may fill out a registration form and receive their room key. Both processes aim to ensure a smooth arrival and verify the identity of the traveler.