Understanding Overpacks – IATA Dangerous Goods Training

Learn how to prepare, mark, and document overpacks correctly under IATA regulations in under 1 hour.

An overpack is an enclosure used to contain one or more packages of dangerous goods. It is commonly used to consolidate multiple packages, improve handling and protect shipments during air transport.

However, using an overpack brings additional responsibilities under IATA Dangerous Goods Regulations. Incorrect marking, labelling or documentation of an overpack can lead to shipment rejection, delays or safety risks.

This practical course teaches you when and how to use overpacks correctly, including all marking, labelling and documentation requirements for compliant air transport.
Ideal for shippers, freight forwarders, warehouse staff and logistics professionals. Duration: approx. 1 hour.
Course AT A glance
  • Duration: 1 hour
  • Level: Intermediate
  • Certificate: Yes (valid for 2 years)
  • Exams: Yes
  • Author: Veerle Melis


Price: €30 (VAT included)
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Course Content

What you will learn

  • What an overpack is and when it may (or may not) be used
  • Difference between overpack, outer packaging and consolidated shipments
  • Correct marking and labelling requirements for overpacks
  • How to display UN numbers, proper shipping names and hazard labels on an overpack
  • Documentation requirements — when a Shipper’s Declaration is needed
  • Special provisions and limitations for overpacks containing different hazard classes
  • Best practices for safe and compliant use of overpacks in air transport

About the Trainer

This course is created by Veerle Melis, an aviation compliance specialist with over 30 years of experience in air cargo and dangerous goods regulations.

Veerle has trained hundreds of shippers, freight forwarders and logistics professionals across Europe. She is the founder of dangerousgoods.online.

Frequently asked questions

What is an overpack?

An overpack is an enclosure used by a single shipper to contain one or more packages. It’s used for easier handling or to consolidate multiple packages into one unit. Common examples include shrink-wrapped pallets or boxes containing smaller packages.

Do overpacks need to be marked and labeled?

Yes. Overpacks must display all markings and labels of the packages inside, unless these are clearly visible from the outside. In addition, the word “OVERPACK” must be clearly marked if required.

Are airlines allowed to break down an overpack? 

No. Overpacks must remain sealed and intact. Airlines are not permitted to dismantle or open an overpack.

Can I put different hazard classes together in one overpack?

In many cases yes, but there are strict segregation rules. Certain combinations of dangerous goods are not allowed in the same overpack.
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