Airline designated as the “owning” ticketed carrier; the carrier on whose “plate” the ticket is issued. The validating carrier is the carrier to which payment is submitted and is usually the first carrier on the itinerary (domestic) or the carrier on the first international flight (international). If a ticket is issued on multiple carriers or is validated on a carrier not on the itinerary, the validating carrier is responsible for payment to the other airlines on the ticket.