What is an Air Waybill (AWB)? Plain-English Guide

In one sentence

An Air Waybill (AWB) is a non-negotiable transport document issued by (or on behalf of) an airline that acts as a receipt for the goods, the contract of carriage between shipper and carrier, and a customs declaration. Every airfreight shipment in the world moves under an AWB.

If you've ever shipped something internationally by air — from a single carton sent by DHL to a 5,000kg consolidation on a freighter — there was an AWB number attached to it. The AWB number is how the airline, the forwarder, customs, and the consignee all reference the same shipment.

Quick contrast: Unlike a Bill of Lading (used in sea freight), an AWB is not a document of title. The named consignee on the AWB simply presents identification at destination to collect the goods — there are no original copies to release, no ransom situation if the document is lost in transit.

The three jobs an AWB does

Receipt for the goods. When the airline (or its handling agent) accepts the shipment at origin, the AWB is the proof of receipt. It records what was tendered: pieces, weight, description, and any visible damage at acceptance.
Contract of carriage. The AWB sets out the terms under which the airline agrees to transport the goods — the routing, the agreed charges, and the limits of the airline's liability under the Montreal Convention 1999.
Customs declaration. The AWB is one of the documents customs authorities use at origin and destination to identify the shipment, the consignee, and the declared nature and value of the goods.

The AWB number — how to read it

An AWB number is always 11 digits, written with a hyphen after the third digit. It looks like this: 125-12345675.

First 3 digits — airline prefix. Every airline that issues AWBs has its own IATA-allocated 3-digit prefix. 125 is British Airways, 020 is Lufthansa, 176 is Emirates, 157 is Qatar Airways. Look up the prefix and you immediately know who the issuing carrier is.
Digits 4–10 — serial number. A 7-digit running serial number unique within that airline's stock.
Digit 11 — check digit. Calculated from the serial number using a "modulo 7" check. If the check digit doesn't add up, the AWB number is invalid and most airline systems will reject it.

Because the prefix tells you the issuing airline, you can spot a Master Air Waybill (issued by the airline) from a House Air Waybill (issued by a forwarder) just by looking at the number — forwarder HAWB numbers don't follow the IATA prefix scheme.

Master AWB vs House AWB

MAWB — Master Air Waybill

Issued by the airline to the freight forwarder.

Covers the entire consolidated shipment travelling on the aircraft.

Uses an IATA airline prefix (e.g. 125-…).

Names the forwarder as shipper and consignee — no individual customer detail.

HAWB — House Air Waybill

Issued by the freight forwarder to each individual shipper.

Covers one customer's portion of the consolidation.

Uses the forwarder's own numbering (often customer-friendly).

Names the actual shipper, consignee, and notify party — the customer-facing document.

For a typical UK importer receiving a shipment from a forwarder in Shanghai, you will see both: a HAWB number on your forwarder's pre-alert and invoice, and a MAWB number that the airline's systems use. The MAWB will appear on your customs entry; the HAWB is what the forwarder uses operationally.

What's on an AWB? Field-by-field

An AWB is a structured 24-box form. Whether it's a paper IATA neutral AWB or a digital e-AWB, the data fields are the same. The key boxes:

AIR WAYBILL — KEY FIELDS125-12345675

ShipperThe exporter / sender of the goods. Full name and address.

ConsigneeThe named receiver. Cannot be "to order" — AWB is non-negotiable.

Issuing carrierThe airline issuing the AWB (or the forwarder for a HAWB).

Airport of departureOrigin airport, IATA 3-letter code (e.g. PVG = Shanghai Pudong).

Airport of destinationFinal airport, IATA 3-letter code (e.g. LHR = London Heathrow).

RoutingThe flight(s) the goods are booked on. Direct or via a transit hub.

Pieces / weightNumber of pieces, gross weight (kg), volume (cbm), chargeable weight.

Nature of goodsPlain-English description of the cargo — no codes, no abbreviations.

ChargesThe freight rate, surcharges (FSC, SCC), and total — paid by shipper or consignee ("prepaid" or "collect").

Declared value for carriageOptional — sets the airline's liability cap. NVD = "no value declared".

Declared value for customsUsed by destination customs alongside the commercial invoice.

Handling informationSpecial instructions: temperature, dangerous goods UN numbers, Notify Party, fragile, etc.

Watch this in practice: The "nature of goods" field is regularly used as a customs red flag. Generic descriptions like "samples", "spare parts", or "machinery" tend to attract examination. A specific, accurate description (e.g. "stainless steel hydraulic fittings, HS 8412.21") clears more smoothly.

Prepaid vs Collect — who pays?

The AWB names which party is responsible for paying the airfreight charges. There are two options, and they affect cash flow significantly:

Prepaid (PP). The shipper pays the airline at origin. Used under CIF, CIP, CFR, CPT, DAP, DPU and DDP Incoterms — anywhere the seller is responsible for the main carriage. The consignee in the UK pays nothing to the airline.
Collect (CC). The consignee pays the airline at destination, before goods are released. Used under EXW, FCA, FOB, FAS, CFR (less commonly) — anywhere the buyer is responsible for the main freight. UK importers will see this on FOB and FCA shipments.

If your AWB is marked CC (Collect), you cannot collect the goods from the airline's import shed until the freight charges are settled. This is the single most common cause of customs clearance delays in airfreight — the goods land, but the collect charges haven't been arranged.

Paper AWB vs e-AWB

The industry has spent the last decade migrating from paper AWBs to e-AWB — electronic Air Waybills. Under the IATA e-AWB programme and the Multilateral Agreement (MeA), the airline and forwarder agree that the digital data record is the AWB; no paper original is required.

For a shipper this rarely matters — you don't see the paper anyway, your forwarder books with the airline. But it has practical implications:

Faster cargo acceptance at origin (no manual data re-entry)
Fewer document discrepancies (single source of truth)
Some lanes still require paper backup — particularly where origin or destination customs systems are not e-AWB capable
Dangerous Goods Declarations remain paper in most cases — e-DGD is rolling out slowly

Common AWB mistakes — and what they cost

Mistake	What happens
Wrong consignee address	Notify party can't be reached, customs entry delayed, storage charges accrue at the airline shed.
Generic goods description	Customs examination triggered. Adds 1–3 days and an exam fee.
Charges marked Prepaid in error on FOB	Shipper pays freight they didn't agree to. Disputed credit notes, supplier relationship damage.
No declared value for customs	Customs may use a default or assessed value, often higher than actual — duty and VAT overpaid.
HAWB number doesn't match invoice	Pre-alert mismatch, customs entry rejected, manual correction required.
Wrong airport code	Goods routed to wrong UK airport — re-trucking cost (often £200–600) charged to consignee.

Practical tip for UK importers: When you receive a pre-alert from your forwarder, always check the consignee, the chargeable weight, the routing, and whether the AWB is Prepaid or Collect before the goods land. Catching a mistake while the shipment is in the air is much cheaper than catching it at LHR import shed.

Practical shipment example: A Manchester importer receives a HAWB from its forwarder and a MAWB number from the airline consolidation. The HAWB controls the forwarder-to-customer record; the MAWB controls the airline movement. Quoting the wrong number to the airline, shed or forwarder is a common reason cargo tracing slows down.

Related terms

Airfreight A–Z — full glossary of airfreight terminology
Bill of Lading — the sea freight equivalent (and how it differs)
Freight forwarder — who issues HAWBs and why
Volumetric weight — how the chargeable weight on the AWB is calculated