The International Union of Marine Insurance (IUMI) recently issued a guidance document on the International Standards for Phytosanitary Measures No. 15 (ISPM 15) that puts a commonly overlooked risk front and center: non-compliant wood packaging material (WPM) is creating real operational and financial threats for international cargo transport.

The standard governs wood packaging used in global trade, including pallets, crates, and dunnage. IUMI Secretary General Lars Lange notes that while ISPM 15 is a phytosanitary measure at its core, deviations in enforcement carry serious operational and financial consequences for the ocean cargo industry.

For small and mid-sized importers and exporters, and for factory owners, the moment customs or destination port authorities find non-compliant wood packaging, their interventions translate straight into money lost: holding the cargo, demanding emergency treatment or fumigation, ordering repacking or destruction of the packaging, or sending the goods back to origin. The goods are fine, but you paid more and the delivery slipped.

Three mainstream packaging options, reviewed:

Packaging today falls into three camps: traditional solid wood with a fumigation mark, fumigation-free materials, and non-wood alternatives. Here is a side-by-side comparison built on actual customs risk and cost differences.

Option 1: Solid wood packaging + ISPM 15 fumigation/heat treatment mark

The most traditional option, with high load capacity, suited to heavy machinery, large equipment, and other factory-style export goods.

  • Requirements: You must use wood that a registered treatment provider has heat treated (HT) or fumigated with methyl bromide (MB), and apply a clear IPPC mark. The mark must carry the IPPC symbol, country code, provider number, and treatment code.
  • Risks:
    1. Faded or missing mark: handling before loading can rub the mark illegible, and on arrival it counts as unmarked.
    2. Live pests inside: even with a mark, live pests in the wood get treated as fraud.
    3. Paperwork that does not match: you have the mark but cannot produce the matching treatment certificate or batch records.
  • Cost structure: The wood itself is cheap, but add the fumigation or heat treatment fee and the administrative cost of issuing certificates. Fail compliance and emergency fumigation plus repalletizing at the destination port usually run several times the origin treatment fee, with demurrage on top.
  • Recommendation: Choose it only when the weight and volume of the cargo require solid wood. Buy from a registered provider, inspect visually before loading, and verify the IPPC mark is present and legible. Keep the treatment certificates, batch records, and the supplier's registration proof.

Option 2: Fumigation-free materials (plywood, oriented strand board, and similar)

Pallets or crates made from engineered panels go through high heat and pressure during production, so they cannot spread pests and sit outside ISPM 15's scope.

  • Requirements: No IPPC mark, no fumigation certificate.
  • Risks: Very low. At ports with strict enforcement, though, officers who cannot tell solid wood from engineered board by eye may ask you to open the container and explain, which costs time. Its load ceiling is also lower than good solid wood, so it does not suit overweight equipment.
  • Cost structure: A single pallet costs a little more than untreated solid wood, but you skip the fumigation fee, the certificate fee, and potential inspection delays at destination. Total cost usually beats Option 1.
  • Recommendation: The default choice for most small and mid-sized export shipments, standard industrial goods, and spare parts. For LCL cargo especially, going straight to fumigation-free pallets is the cheapest defense against getting caught up in someone else's violation. For SOHO operators and sole traders, the material also saves the effort of checking certificates and marks, cutting the cost of trial and error.

Option 3: Non-wood alternatives (plastic, metal, paper pallets)

No wood at all, which sidesteps every ISPM 15 clause at the root.

  • Requirements: No phytosanitary requirements apply.
  • Risks: Zero phytosanitary risk. Physical risks remain: plastic pallets can deform at extreme temperatures, paper pallets handle moisture poorly, and heavy metal pallets raise freight costs.
  • Cost structure: The highest upfront purchase cost. In a long-term, closed-loop supply chain, where the same pallets circulate between specific customers, the per-use cost becomes acceptable.
  • Recommendation: Suits high-value products, food and pharmaceutical exports with strict hygiene requirements, and urgent shipments where customs speed is critical and an inspection delay is unacceptable.

Whichever option you pick, these simple, low-cost precautions cut the odds of your cargo being denied entry by a wide margin.

1. For cargo that must use solid wood packaging:

  • Verify the supplier: Buy wood packaging only from registered providers, and request and keep their registration proof.
  • Inspect every piece: Before loading, check the IPPC mark on every pallet, crate, and piece of dunnage rather than spot-checking, and confirm it is intact and legible.
  • Cross-check the paperwork: Make sure the provider number on the physical packaging matches your treatment certificate and batch records.
  • Photograph everything: Keep photos of the packed cargo and its marks. If a dispute arises at the destination port, these are the baseline evidence for an insurance claim and for recovering from the liable party.

2. For LCL and consolidated cargo:

If you deliver loose cargo to a warehouse, confirm with your freight forwarder at booking: does the warehouse's shared dunnage meet ISPM 15, or is it all fumigation-free material? Do not assume the warehouse handles it. If another shipment in the same container gets flagged for its dunnage, your schedule slips too.