ISPM-15 and Wooden Pallets: The Rule That Can Stop Your Knitwear Shipment

By YZR Sweaters · 2026-11

Of all the ways a knitwear shipment goes wrong, this one is the most absurd from a garment buyer's perspective: perfect sweaters, clean documents, on-time vessel — and the container gets held because of the wooden pallets under the cartons. No buyer thinks about pallets, and that is precisely the problem, because the regulation applies to the packaging, not the product. We have watched it cost one importer a three-week delay and a four-figure treatment bill. Here is the whole subject in one article, so it never costs you anything.

What ISPM-15 actually requires

The standard exists to stop insects and plant pathogens riding across borders inside raw wood. Its rules are simple to state:

• Scope. All solid wood packaging material thicker than 6mm — pallets, crates, boxes made of lumber, and dunnage (loose wood used to brace cargo). It applies to essentially every importing country that enforces phytosanitary rules: the US, Canada, the EU, Australia and New Zealand, Japan, China itself, Brazil, and most others.
• Treatment. The wood must be heat-treated (marked HT — the core of the wood held at a specified temperature for a specified time) or fumigated with methyl bromide (marked MB, a treatment being phased out and refused by a growing list of countries). Heat treatment is what you will see in practice from Chinese suppliers today.
• The stamp. Compliance is proven by the IPPC mark stamped into the wood: the IPPC logo, the ISO country code (CN for China), a unique registration number for the treatment provider, and the treatment code (HT or MB). No stamp, no compliance — a certificate is not a substitute for the mark on the wood itself.
• Exemptions. Engineered wood products — plywood, oriented strand board, particle board — are exempt because the manufacturing process destroys the risk. So are plastic, metal, paper and composite pallets. Your cardboard cartons are exempt; the solid-wood pallet under them is not.

The one nuance worth knowing: compliant wood stays compliant, but repaired or remanufactured pallets must be re-treated and re-stamped by a registered facility. A pallet that was compliant two years ago and has since had boards replaced is no longer compliant. That is exactly how non-compliant pallets slip into otherwise professional shipments.

What actually happens when pallets fail

Enforcement is customs discretion, which means it is random from your point of view — most shipments with bad pallets pass unnoticed, which teaches everyone the wrong lesson. When a container is checked and fails:

• The US and Canada typically require re-export or destruction of the wood packaging, sometimes the entire shipment's packaging, at the importer's cost, with the goods held while it is resolved.
• The EU generally requires the wood to be re-treated, destroyed or removed under official supervision, with storage and handling charged to the importer.
• Australia and New Zealand are the strictest quarantine regimes in the trade — expect inspection on arrival for wood packaging, directed treatment options, and costs that can dwarf the freight itself.

In every case, add the cost that never appears on the invoice: your season calendar slipping two to four weeks while a container sits at a treatment facility. Our landed cost model has a line for detention and demurrage for exactly this family of surprises.

Where the responsibility sits — and where you want it

By convention the exporter arranges and pays for pallets, and the forwarder books compliant wood as a matter of routine. In practice, the buyer's packing specification governs everything, which is why the cleanest position is to write it down:

• In the PO or packing spec: "All wooden pallets, crates and dunnage to be ISPM-15 compliant, HT-treated, IPPC-marked, free of bark and damage; pallet dimensions and stackability as per drawing." This one sentence moves the problem from your customs broker's desk to the factory's, where it costs almost nothing to solve.
• At pre-shipment inspection: have the inspector photograph the pallet stamps during the container loading check. Two minutes of camera work buys you evidence if the wood is ever questioned, and it catches the classic failure — old, repaired or unstamped pallets pulled from a corner of the warehouse.
• In the loading plan: confirm whether your destination warehouse needs pallets at all, and in what size. Pallet standards differ (the 1200×800mm EUR footprint versus the 48×40-inch US pallet), and a mismatch costs nothing on paper and real money at the receiving dock.

The alternatives when you would rather not ship wood at all

• Plastic pallets. No ISPM-15 scope, dimensionally stable, hygienic, and increasingly standard for repeat container programmes with replenishment cycles. They cost more per trip unless you run a returnable loop with your forwarder or customer.
• Paper and composite pallets. Lightweight, fully exempt, surprisingly strong at knitwear carton weights, and often the cheapest total answer for air freight where every kilo is billed. Check your consignee's racking and handling limits before switching.
• Floor loading. Cartons loaded loose into the container with no pallets at all — no wood, no stamp, lower cost, at the price of slower and more manual unloading at destination. Common for full-container sweater shipments where the receiver has a dock team and slip sheets if needed.

The choice interacts with the rest of your packing decisions — hanging versus flat packing, carton strength, desiccant for moisture control — so treat pallet strategy as part of the packing specification, not a line item the forwarder handles blind.

At YZR Sweaters we ship knitwear from Dongguan for fashion brands, wholesalers and online retailers, and our standard packing spec includes HT-stamped, IPPC-marked wooden pallets with stamp photos taken at loading, or plastic/paper/floor-loaded alternatives when the buyer's warehouse prefers them. We would rather spend the two minutes photographing stamps than spend your three weeks at a quarantine yard. Tell us your destination and dock setup, and the packing will be engineered for it.

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