ISPM 15 Wood Packaging: Reading the Stamp and Avoiding Rejections

The compressor was built to specification, invoiced correctly and cleared by the broker's paperwork. It still sat at a US examination station for nine days, because the crate under it carried a stamp reading "IN 0417 HT" instead of "IN-0417 HT". One missing hyphen on a wooden skid turned a routine import into an Emergency Action Notification, a re-export booking and a penalty case.

Wood packaging rules punish small marking faults because inspectors cannot see inside the wood: the stamp is the only evidence that a pallet, crate or piece of dunnage was heat treated or fumigated. Once your team can read every element of the mark, knows which wood is exempt and holds the stamp photographs before the container is sealed, most port rejections stop before they start.

• What this guide covers: the four required parts of the mark, common marking faults, scope and exemptions, treatment codes, repaired pallets, and enforcement at US and Indian ports.
• What it adds: a worked cost ledger for a US rejection and an Indian point-of-entry treatment, a packaging declaration with validation rules, and a timestamped trace of a rejected crate.

Decoding the four required elements of the ISPM 15 mark

A compliant ISPM 15 mark has exactly four required parts inside one bordered box: the IPPC symbol, a two-letter ISO country code, a producer or treatment provider code, and a treatment code. The country code must be joined to the producer code with a hyphen, and nothing else may appear inside the border.

ISPM 15, the international standard for wood packaging, sets the layout in its Annex 2. The country code is the ISO two-letter code of the country where the wood packaging was treated and marked, not the country of the exporter. The producer or treatment provider code is assigned by that country's national plant protection organization, which sets its number and order of digits or letters.

• IPPC symbol: the wheat-ear symbol on the left, separated from the codes by a vertical line inside the border.
• Country code: two capital letters such as US or IN, followed directly by a hyphen.
• Producer or provider code: the unique number the plant protection organization issued to the facility that treated or marked the wood.
• Treatment code: HT, DH, MB or SF, placed after the combined codes, either on its own line or after another hyphen on the same line.

Annex 2 also says how the mark is applied. It must be legible, durable and not transferable, and placed where it is visible when the packaging is in use, preferably on at least two opposite sides. It must not be hand drawn, and red or orange should be avoided because those colours are used for dangerous goods labels. Trademarks or an authorizing body's logo may sit beside the border, never inside it.

ISPM 15 Annex 2 requires every treated pallet, crate or dunnage piece to carry the IPPC symbol, an ISO two-letter country code joined by a hyphen to the producer code, and a treatment code of HT, DH, MB or SF, visible preferably on 2 opposite sides of each packaging unit.

Stamp faults inspectors flag before they look at the cargo

Most rejections come from the stamp, not from live insects. A missing element, a hand-painted mark or a mark only visible from inside the load gives an inspector grounds to act without testing a single board, so screen for these faults at the packing line.

Enforcement of the hyphen tightened recently in the US. APHIS and CBP did not take regulatory action from March to 31 December 2025 on shipments whose only fault was a missing hyphen after the country code, and resumed enforcement on 1 January 2026. Every other ISPM 15 provision stayed in force throughout, so the hyphen is now a live rejection reason again.

• Missing hyphen: "IN 0417 HT" or "IN0417 HT" in place of "IN-0417 HT"; enforced again in the US from 1 January 2026.
• Hand-drawn or stencilled freehand: any mark applied without a stamp, brand or stencil tool fails Annex 2 outright.
• Single hidden mark: one stamp on an inside block that faces the cargo, so nothing is visible once the pallet is loaded.
• Red or orange ink: a colour the standard says to avoid; some inspectors treat it as a reason for closer examination.
• Extra text inside the border: a supplier logo, date code or order number placed inside the box rather than beside it.
• Illegible brand: a heat brand that charred into the grain, or a stamp that wore off a reused pallet.
• Legacy codes: older marks with a DB (debarked) code; Annex 2 asks importing countries to accept marks made under earlier versions of the standard, though debarking is now required whatever the code.

Which wood is in scope: dunnage, crates, reels and the exemptions

The standard covers any packaging made from raw wood, including pallets, crates, boxes, cases, cable drums, spools and dunnage. Processed wood such as plywood is exempt, and so are a short list of low-risk items, but the US and Indian texts word one exemption slightly differently from ISPM 15.

ISPM 15 exempts wood packaging made entirely of thin wood 6 mm or less in thickness; wood packaging made wholly of processed wood such as plywood, particle board, oriented strand board or veneer made with glue, heat or pressure; wine and spirit barrels heated during manufacture; processed gift boxes; sawdust, shavings and wood wool; and wood components permanently attached to freight vehicles and containers.

The US definition of regulated wood packaging material in 7 CFR 319.40-1 excludes manufactured wood materials, loose wood packing materials and wood pieces less than 6 mm thick in any dimension. India's clause 3(20A) of the Plant Quarantine (Regulation of Import into India) Order, 2003, exempts processed wood products, veneer peeler cores, sawdust, wood wool and shavings, and thin wood pieces of less than 6 mm, unless they harbour regulated pests.

Dunnage needs special care because it is cut to length at the stuffing point. Annex 2 asks shippers to make sure every piece of dunnage is treated and carries a complete mark, and says small offcuts that do not show the whole mark should not be used. Buying dunnage marked along its full length at short intervals solves most of the problem. Our guide to the container stuffing plan and load securing covers where that dunnage goes; this section covers whether it may enter the destination at all.

Treatment codes HT, DH, MB and SF and what each schedule requires

The treatment code tells an inspector which approved schedule was used. Heat treatment is the default worldwide; methyl bromide remains approved under ISPM 15 but is restricted by size and by ozone-layer commitments, and all four treatments require debarked wood.

Whatever the treatment, the wood must be debarked. Small, separate pieces of bark may remain if each is less than 3 cm wide, whatever its length, or wider than 3 cm with a surface area under 50 square centimetres. A pallet with a valid mark but a large bark patch is still non-compliant, which is why receiving inspectors look along the stringers as well as at the stamp.

In the US, the American Lumber Standard Committee administers the heat treatment and methyl bromide programs with APHIS, and producers enrol with an accredited inspection agency. In India, the Directorate of Plant Protection, Quarantine and Storage accredits treatment providers. Checking a producer code against the current accreditation list is a quick control on new pallet suppliers.

Repaired and remanufactured pallets: the one-third rule

A treated and marked pallet keeps its status for life unless it is altered. Once up to about one third of its components are replaced it is repaired; beyond one third it is remanufactured and must be re-treated and re-marked with old marks obliterated.

For a repair, ISPM 15 section 4.3.2 allows only treated wood or processed wood as replacement parts, and each added treated component must carry its own mark. Countries where repair happens may also require old marks to be obliterated and the whole unit re-treated. Several marks on one pallet are not in themselves a non-compliance, but they slow inspection when an inspector tries to trace an infested board.

• Repaired unit: up to about one third of components replaced with treated, individually marked boards or with processed wood.
• Remanufactured unit: more than about one third replaced; old marks covered with paint or ground off, the unit re-treated and marked anew.
• Doubtful history: where the treatment of every component cannot be confirmed, the repairer should re-treat, destroy or keep the unit out of international trade.

This is where pallet pools and returnable programs meet plant health. Our page on the returnable packaging pallet ledger tracks how many pallets you own and where they are; for export lanes, add a repair-count field to that ledger so a pallet that has crossed the one-third line is withdrawn from export use until it is re-treated.

Release, re-export and penalties at a US port of entry

In the US, wood packaging without a compliant mark can be ordered re-exported immediately, and CBP can both claim liquidated damages for ignoring the resulting order and penalize the importer for the violation itself. Treat a missing hyphen as a cost event, not a clerical one.

Under 7 CFR 319.40-3(b), regulated wood packaging must be treated under 7 CFR part 305 and carry the IPPC-approved mark with the ISO country code, producer number and treatment abbreviation. Paragraph (b)(3) lets an inspector at the port of first arrival order the immediate re-export of unmarked wood packaging. APHIS lists safeguarding, supervised destruction of the wood packaging and re-export as the corrective options, set out on an Emergency Action Notification.

• Safeguarding: holding or treating the shipment so pests cannot escape while the case is resolved, for example under tarpaulin or by fumigation.
• Supervised destruction: separating the non-compliant wood from the goods and destroying it under APHIS supervision, which works only when the cargo can be repacked.
• Re-export: sending the shipment back to origin or to another destination when it cannot be brought into compliance.

CBP's mitigation guidelines, updated in October 2019, describe two tracks. If an importer, carrier or bonded custodian fails to take the action an Emergency Action Notification requires, CBP may claim liquidated damages under the bond; where the action was taken late, the claim may be cancelled on payment of $500 to $5,000. Separately, since 1 November 2017, CBP may penalize a single violation of 7 CFR 319.40-3 under 19 U.S.C. 1595a(b).

CBP penalties for non-compliant wood packaging under 19 U.S.C. 1595a(b) are assessed at the value of the articles, including the wood, and CBP's 2019 mitigation guidelines allow a first violation to be mitigated to 1 to 10% of that assessment, a second to 10 to 25%, and later ones to at least 25%.

Mitigating factors in the same guidelines include clear evidence of immediate remedial action, an established compliance record, wood that was actually treated but unmarked or illegibly marked, and a small non-compliant share of the shipment. Falsely marked wood and attempts to hide a violation aggravate the case. Keeping stamp photographs and supplier treatment records ready is therefore also a mitigation file. Our article on the customs exam hold explains the examination process that usually surfaces these findings.

Point-of-entry treatment in India under clause 3(20A)

India does not default to re-export. Under clause 3(20A) of the Plant Quarantine (Regulation of Import into India) Order, 2003, Customs refers untreated or unmarked wood packaging to the Plant Quarantine Officer and releases the goods only after the wood is treated at the point of entry under that officer's supervision.

Clause 3(20A) was inserted by the Plant Quarantine (Regulation of Import into India) Third Amendment Order, 2004. It bars Customs from releasing any article packed with raw or solid wood packaging unless the packaging is treated and marked under ISPM 15 or comes with a phytosanitary certificate endorsing the treatment. Jawaharlal Nehru Custom House Standing Order 18/2010 repeats the rule and lists treatment, destruction or deportation to the exporting country as the outcomes.

• Import into India: referral by the shed officer to the Plant Quarantine Officer, treatment at the point of entry, then out-of-charge; Standing Order 18/2010 also requires non-compliance to be reported to the Directorate. Certificates for plant goods themselves are a separate document, covered in our page on phytosanitary certificates in export logistics.
• Export from India: General Note G to the ITC (HS) 2022 export policy allows exports that use wood packaging such as pallets, dunnage, crating, packing blocks and drums only on compliance with ISPM 15.
• Customs at export: JNCH Public Notice 11/2014 told exporters that cargo without the ISPM 15 mark, or with doubtful marking, would be reported to the Plant Quarantine authority.

The 2004 clause carries its own list of treatments, including methyl bromide at 48 g/m³ for 16 hours at 21 °C and heat treatment at 56 °C for 30 minutes at the core. That methyl bromide wording predates the current ISPM 15 Annex 1 schedule, so foreign suppliers should treat to the current Annex 1 schedule and mark accordingly rather than work from the Indian clause text.

Trace of a crate rejected for a missing hyphen at Houston

A single stamp fault can cost more than the crate's freight. The illustrative trace below follows a crated compressor shipped from India to a US importer in February 2026, after hyphen enforcement resumed, and shows where a stuffing-point photograph would have stopped it.

1. 9 February 2026, 08:40, examination: container for bill of lading HOU-26-0219 is moved to a centralized examination station. A CBP agriculture specialist finds the compressor crate skid stamped "IN 0417 HT" on one side only, with no hyphen.
2. 9 February, 11:15, Emergency Action Notification: notice EAN-26-0381 orders the wood packaging re-exported. The compressor is bolted to the skid, so the wood cannot be separated without unpacking and exposing the unit.
3. 10 February, 09:30, options review: the broker asks whether supervised destruction of the skid is possible. The importer decides that re-crating at the station is impractical and books the full crate back to origin.
4. 18 February, 16:00, re-export: the crate sails under the re-export booking. Storage and exam charges for nine days are invoiced to the importer, and the entry is closed against the re-export.
5. 2 April, 10:05, penalty notice: CBP issues a 19 U.S.C. 1595a(b) penalty assessed at the value of the articles. The importer petitions with the supplier's heat-treatment record, which shows the wood was treated but mismarked.

The supplier's kiln record proved treatment, which helped mitigation, but it could not save the shipment. A rule in the importer's purchase order requiring photographs of two compliant stamps before stuffing, checked by the forwarder at the container freight station, would have caught the fault in India for the price of a new stamp.

Worked cost of a US rejection and an Indian port treatment

On illustrative figures, the US rejection costs between about $8,000 and $15,800 before the replacement shipment, while the Indian point-of-entry treatment costs about ₹66,300 and a few days. The difference comes from the US re-export path and the penalty.

Two points stand out. The US penalty band alone can exceed every logistics cost line, so the first-violation mitigation factors deserve attention before the petition is written. In India the bigger risk is delay to production, because treatment, inspection and paperwork stretch dwell, which is why importers move the check upstream to the supplier rather than relying on port treatment.

Record owners, enforced checks and stamp reads that need a person

Responsibility for wood packaging is split across supplier, exporter, forwarder, broker and the importer's compliance team, so name an owner for each record. The importer carries the US penalty exposure even when the fault sits with a pallet supplier two tiers back.

Data checks on a packaging declaration catch blanks and impossible codes, and a photo model can read a stamp, but deciding whether a mark is hand drawn, legible or applied to the right boards remains a trained person's call.

{
  "shipmentRef": "PO-77314 / ASN 900288",
  "container": "stuffing job CFS-NSA-26-1142",
  "packaging": [
    { "unit": "pallet",  "material": "solid wood", "qty": 12,
      "ispm15": { "country": "IN", "producerCode": "0417", "treatment": "HT",
                  "hyphenPrinted": true, "sidesMarked": 2,
                  "photos": ["IMG-5521", "IMG-5522"] } },
    { "unit": "dunnage", "material": "solid wood", "qty": 6,
      "ispm15": { "country": "IN", "producerCode": "0417", "treatment": "HT",
                  "hyphenPrinted": true, "sidesMarked": 1,
                  "photos": ["IMG-5530"] } },
    { "unit": "crate",   "material": "plywood", "qty": 1, "ispm15": null }
  ]
}

Validation before the container is sealed:
  BLOCK  if material = "solid wood" and ispm15 is null
  BLOCK  if country does not match ^[A-Z]{2}$ (ISO 3166-1 alpha-2)
  BLOCK  if treatment not in ("HT", "DH", "MB", "SF")
  BLOCK  if hyphenPrinted = false
  REVIEW if unit = "pallet" or "crate" and sidesMarked is below 2
  PASS   if material in ("plywood", "OSB", "particle board") with ispm15 null

Stuffing-point validation of the wood packaging declaration in the forwarder's job file should block release when solid wood lacks ISPM 15 data or the printed mark omits the hyphen, consistent with 7 CFR 319.40-3(b)(2); stamp photographs of 2 opposite sides then form the evidence for any CBP mitigation petition.

Packaging specification checklist for exporters and importers

Write the wood packaging rule into the purchase order, verify it at stuffing and keep the evidence with the shipment. The checklist below covers a new supplier or a new export lane.

Most of these controls live in documents and job files that already exist; the work is making them mandatory fields rather than good intentions. For more trade-document topics, browse the Logistics and Supply Chain hub. If you want help building the packaging declaration and stuffing checks into your forwarding or warehouse system, you can send us an RFP describing your lanes and suppliers.