Shipping goods internationally introduces a layer of pallet compliance that domestic shippers never have to think about. Most countries regulate the type of wood packaging materials (WPM) that can enter their borders, primarily to prevent the spread of invasive insects and plant diseases through untreated wood. Getting pallet compliance wrong can result in shipment rejection at the port of entry, quarantine holds, fumigation costs, fines, and significant delays that damage customer relationships and cost real money. This guide covers the regulations you need to know for major export destinations and the documentation required to ship with confidence.
ISPM-15: The Global Standard for Wood Packaging
The International Standards for Phytosanitary Measures No. 15 (ISPM-15) is the foundation of virtually all international wood packaging regulations. Developed by the International Plant Protection Convention (IPPC) — a treaty organization under the United Nations — ISPM-15 establishes treatment and marking requirements for wood packaging materials used in international trade.
ISPM-15 requires that all solid wood packaging materials (pallets, crates, dunnage) be either heat-treated or methyl bromide fumigated to kill pests. Heat treatment (HT) requires the core temperature of the wood to reach 56 degrees Celsius for a minimum of 30 continuous minutes. Methyl bromide (MB) fumigation is being phased out in many countries due to environmental concerns, making heat treatment the standard in practice.
Understanding the ISPM-15 Stamp
The wheat stalk logo indicates the pallet complies with international phytosanitary standards.
Two-letter ISO country code identifying where the treatment was performed (e.g., US for United States).
Unique identifier assigned to the treatment facility by the national plant protection organization (APHIS in the US).
HT = Heat Treated (most common). MB = Methyl Bromide (restricted in many countries). DH = Dielectric Heating (microwave).
The ISPM-15 stamp must be clearly visible and legible on at least two opposite sides of the pallet.
Country-Specific Requirements: What You Need to Know
While ISPM-15 provides the baseline, individual countries may impose additional requirements or have specific enforcement practices. Here is what exporters need to know for major trading partners:
European Union (EU)
- •Full ISPM-15 compliance required for all 27 member states
- •Heat treatment (HT) strongly preferred — MB is banned for phytosanitary use in the EU
- •No bark allowed on pallet surfaces (debarked requirement, DB marking)
- •Pallets must be free from live pests at point of entry
- •Random inspections at ports of entry — non-compliant shipments face quarantine or destruction
The EU is one of the strictest enforcers of ISPM-15. Ensure your ISPM-15 stamps are clearly legible and that no bark remnants exceed the allowed limits (less than 3cm wide or less than 50cm2 total).
Canada
- •ISPM-15 compliance required for all wood packaging from non-Canadian origins
- •Both HT and MB treatments accepted, but HT is standard practice
- •Canadian Food Inspection Agency (CFIA) enforces at border crossings
- •Re-export shipments must still comply if wood packaging was not originally treated
- •No additional requirements beyond ISPM-15 for standard commercial shipments
Canada is a significant trading partner with relatively straightforward enforcement. ISPM-15 compliance is sufficient for most commercial shipments across all provinces.
Australia
- •ISPM-15 compliance is mandatory — Australia has the strictest biosecurity in the world
- •Only HT is accepted — methyl bromide fumigation is NOT accepted for import clearance
- •All wood packaging must be clean and free of soil, seeds, plant debris, and live insects
- •Department of Agriculture, Fisheries and Forestry (DAFF) inspects at arrival
- •Non-compliant shipments are re-exported, treated at the importer's expense, or destroyed
Australia's biosecurity enforcement is exceptionally rigorous. Shipments with even minor non-compliance (illegible stamps, bark fragments, soil contamination) are routinely held for inspection and treatment. Budget extra time and cost for Australian shipments.
China
- •ISPM-15 compliance required for all wood packaging materials
- •Both HT and MB treatments accepted
- •General Administration of Customs (GACC) conducts inspections at ports of entry
- •Some ports apply stricter inspection rates than others — Shanghai and Shenzhen are particularly thorough
- •Non-compliance can result in quarantine, fumigation at port, or return of goods
China has increased enforcement of wood packaging regulations in recent years. Ensure all pallets have clear, complete ISPM-15 markings. Inconsistent or partial stamps are frequently flagged.
Mexico
- •ISPM-15 compliance required under SENASICA (Mexico's food safety authority)
- •Both HT and MB treatments accepted
- •Phytosanitary certificate may be required for certain agricultural products
- •Cross-border truck shipments are subject to random inspection at border crossings
- •Mexico participates in the NAPPO (North American Plant Protection Organization) harmonization framework
Mexico's enforcement is generally consistent with ISPM-15 standards. For frequent cross-border shippers, establishing a relationship with a customs broker familiar with WPM requirements is recommended.
Documentation You Need for Export Compliance
Beyond the ISPM-15 stamp on the pallets themselves, proper documentation supports smooth customs clearance and provides a paper trail in case of disputes. Here is the documentation you should maintain:
Treatment Certificate
Obtain a heat treatment certificate from your pallet supplier that identifies the treatment facility, treatment date, and ISPM-15 compliance. Phoenix Pallet Recycling provides treatment documentation for all ISPM-15 compliant pallets.
Packing Declaration
Many countries require a packing declaration on the commercial invoice or a separate document stating that all wood packaging materials comply with ISPM-15. This is a standard requirement for EU, Australian, and Chinese imports.
Phytosanitary Certificate (if required)
Some destination countries or specific product categories require a phytosanitary certificate issued by APHIS (in the US). Check with your freight forwarder whether your shipment requires one.
Supplier Compliance Records
Maintain records from your pallet supplier confirming ISPM-15 compliance, including the treatment facility's registration number and the date of treatment. These records are invaluable if a shipment is questioned at the border.
Common Mistakes That Cause Shipment Delays
Even experienced exporters sometimes run into compliance issues. Here are the most common mistakes and how to avoid them:
Illegible or Missing Stamps
Inspect every pallet before loading. Stamps must be clearly visible on at least two sides. Re-stamp or replace pallets with faded markings.
Using Non-Compliant Dunnage
Dunnage, blocking, and bracing made of solid wood must also be ISPM-15 compliant. Use plywood, OSB, or treated wood for all support materials.
Bark Remaining on Pallets
ISPM-15 requires debarking. Any bark piece wider than 3cm or larger than 50cm2 can trigger non-compliance. Inspect pallets before shipping.
Mixing Treated and Untreated
A single untreated pallet in a container can cause the entire shipment to be held. Verify every pallet in the load is compliant.
The simplest way to avoid export pallet issues is to source ISPM-15 compliant pallets from a reliable supplier. Phoenix Pallet Recycling supplies heat-treated pallets with proper ISPM-15 markings for export applications. We can also provide documentation of treatment compliance for your customs paperwork.