An AWB is a bill of lading which covers both domestic and international flights transporting goods to a specified destination. Technically, it is a non-negotiable instrument of air transport which serves as a receipt for the shipper, indicating that the carrier has accepted the goods listed therein and obligates itself to carry the consignment to the airport of destination according to specified conditions. Normally AWB refers to the Air Waybill issued by carrying airlines and also called Master Air Waybill (MAWB) which comes with three digits of numeric airline identification codes issued by IATA to non-U.S. based airlines and Air Transport Association of America to U.S. based airlines. However, air freight forwarders also issue HAWB (House Air Waybill) to their customers for each of the shipments.