Accepting dangerous goods for air transport: the first and most critical safety barrier

Every day, thousands of shipments classified as dangerous goods are presented for air transport at cargo terminals around the world. Most proceed without incident. That safety record is not accidental — it is the direct result of a rigorous acceptance process, governed by international regulations such as the IATA Dangerous Goods Regulations (DGR), which ensure that only correctly identified, properly packaged, and fully documented cargo is allowed to fly.

This process is largely invisible to the outside world. But understanding it reveals a sophisticated, multi-layered system designed to leave no margin for error.

Where it begins: documentation and weighing

The acceptance process starts the moment a dangerous goods shipment arrives at the cargo acceptance area — and it begins with paperwork, not packages. Documentation may arrive in hard copy or, increasingly, via Electronic Data Interchange (EDI), a system that allows the consignor's computer systems to transmit the Dangerous Goods Declaration (DGD) and related data directly to the operator in a structured digital format.

EDI significantly reduces manual transcription errors and speeds up the administrative process. However — and this is fundamental — it does not replace the human verification that must follow. Technology receives the data; a trained person must confirm that it matches the physical consignment standing in front of them.

Simultaneously, the shipment must be weighed. This is a requirement of both the operator and, in many cases, the relevant regulatory authorities. Weighing serves several purposes at once:

•       It provides the data needed for aircraft load planning and centre-of-gravity calculations — a poorly balanced aircraft is a danger in itself

•       It confirms that per-package weight limits are being respected — limits that are strictly defined in the regulations for every substance and packaging type

•       It acts as a cross-check against the DGD: if the actual weight does not match what is declared, a red flag is raised immediately — signalling a potential documentation error, a quantity discrepancy, or worse

The core verification: six critical checks

With documentation received and the shipment weighed, the acceptance agent moves to the heart of the process: a systematic verification of the consignment against the declared information. This covers six areas, each of which must be satisfactory before the process can proceed.

 

01	Volume count and package comparison	The number and type of physical packages — including any overpacks grouping smaller items — must correspond exactly to what is stated on the DGD. Any discrepancy, a missing package, an extra item, or a different container type, halts the process immediately.
02	Physical inspection — zero tolerance	Every package is inspected visually for damage, deformation, moisture staining, broken seals, or any trace of leakage, however minor. There is no threshold of acceptable damage. A minor leak on the ground, under controlled conditions, can become a catastrophic failure at altitude under changes in pressure and vibration.
03	Markings verification	Each package must display the correct technical name of the substance, the UN number (the internationally standardised four-digit identifier), consignor and consignee addresses, and any other markings required for that specific commodity or packaging type.
04	Hazard labels	The correct hazard labels for the class of risk — and any subsidiary risks — must be present, undamaged, and properly affixed. Labels that are torn, obscured, or missing are grounds for rejection.
05	Documentation completeness	Three documents are mandatory: two copies of the DGD, the Air Waybill (AWB — the contract of carriage), and any additional paperwork required by regulations or by the authorities of origin, transit, or destination countries.
06	Regulatory compliance	The entire consignment must comply with all applicable IATA DGR requirements for the specific substance, quantity, packaging type, and route — including any State Variations (country-specific rules that may be more restrictive than the baseline standard).

 

The two copies of the DGD: why duplication matters

The requirement for two copies of the Dangerous Goods Declaration is a deliberate redundancy built into the system. Each copy has a distinct purpose:

 

Copy 1 — travels with the shipment Accompanies the consignment to its final destination. Ensures that handling teams at every point along the route — transit airports, destination terminals, emergency services — have immediate access to critical information about the cargo: what it is, what risks it carries, and how to respond in an emergency.

Copy 2 — retained at origin Kept by the operator at the departure station. Provides traceability and serves as the official record of the acceptance decision. Essential for audits, regulatory inspections, and any post-incident investigation.

 

The acceptance checklist: turning regulation into action

With so many verification points to cover — day after day, shipment after shipment, with different staff — the risk of oversight is real. The acceptance checklist is the tool designed to eliminate it.

Far from being a mere formality, the checklist is a structured guide based directly on the IATA DGR. It translates complex regulatory requirements into a series of clear yes/no verification points, covering every mandatory element: correct identification, classification, permitted packaging, compliant markings and labels, and complete documentation.

The checklist is not anonymous. The name and signature of the person who completed each verification are a regulatory requirement — creating a clear chain of individual accountability. When an acceptance agent signs a completed checklist, they are making a formal declaration: this consignment complies with all requirements and is safe to fly.

Document management: what gets filed, and for how long

Once the acceptance process is complete, the documentation is managed according to strict protocols:

•       The checklist, together with Copy 1 of the DGD and the AWB, is placed in a clear, durable polythene pouch and attached securely to the outside of the shipment — accessible to anyone handling it along the route without the need to open the packaging

•       Copy 2 of the DGD is retained by the operator at the origin station for the duration of the shipment's journey, providing a reference point in the event of any issue in transit

•       Once the shipment has been confirmed as delivered, the operator archives Copy 2 of the DGD along with the acceptance records

•       The acceptance checklist and all related documentation must be retained for a minimum of three months after the date of the flight — the regulatory minimum under the IATA DGR, covering the period most relevant for routine audits and post-delivery queries

 

In the event of a serious incident, documentation is retained for considerably longer as part of any formal investigation. The three-month baseline represents the minimum standard for routine operational compliance.

After acceptance: segregation and onward movement

Successful acceptance does not mean the safety requirements are over. Once cleared, the shipment moves to a designated temporary storage or transit zone before being prepared for loading — a process known as build-up, in which individual packages are assembled onto pallets or into unit load devices (ULDs) for the aircraft.

Throughout all subsequent handling, segregation rules apply with equal rigour. Segregation means keeping incompatible dangerous goods physically apart — substances that, if they came into contact through a leak or spillage, could react dangerously: causing fires, explosions, or the release of toxic gases. The IATA DGR includes detailed incompatibility tables specifying which hazard classes must never be stored or loaded together.

Additionally, operators must comply with any specific requirements imposed by local airport authorities and by the competent authorities of every country in the aircraft's routing — origin, destination, transit states, and even overflight countries. These State Variations may impose requirements over and above the IATA baseline standard, and operators must be familiar with all of them for every route they operate.

Why this process exists: the stakes in the air

The acceptance process is demanding because the consequences of failure are not abstract. A mislabelled chemical, an undeclared quantity, a package with a hidden crack — any of these can become a fire, a toxic exposure, or an uncontrollable situation in an aircraft at cruising altitude, where options are limited and the margin for error is essentially zero.

The acceptance check is the last point at which the full weight of human verification, cross-referencing, and professional judgement is applied to a dangerous goods shipment while it is still on the ground, in a controlled environment, with access to all the resources needed to identify and correct a problem.