Why pallets are rejected at borders (and how to prevent it)

Shipping pallets internationally can be straightforward when the right
information and documents are in place. But when customs requirements are
missed or shipment details do not line up, pallets can be delayed, held
for inspection, or rejected at the border altogether.

For businesses, a border problem rarely stays a paperwork problem. It
turns into storage charges, missed delivery dates, frustrated customers,
and disruption that ripples down the supply chain. The good news is that
the large majority of border rejections come down to avoidable mistakes —
and almost all of them can be caught before a shipment leaves the
warehouse.

This guide explains what border rejection actually means, the most common
reasons pallets are stopped, what happens when a shipment is held, and the
practical steps that keep freight moving through customs smoothly.

What border rejection means

When goods cross an international border, customs authorities check that
the shipment complies with that country's
import and export
rules. They rely almost entirely on the documents and declarations
provided, supported where necessary by a physical inspection of the goods.

A pallet can be held, inspected, or turned away for two broad reasons:
something is wrong with the paperwork, or something is wrong with the
physical shipment. Paperwork problems are by far the most common. A recent
analysis of more than 600,000 UK customs declarations found an average
error rate of around 34%, and modern customs systems have only become more
sensitive to discrepancies. Physical problems are less frequent but just
as disruptive, and the single biggest one is non-compliant wood packaging.

A held shipment is not always a rejected one. Many are simply delayed
until a missing document is supplied or a discrepancy is corrected. But
every hold costs time and often money, which is why prevention matters far
more than cure.

The most common reasons pallets are stopped

Most border problems trace back to the same handful of issues:

• vague or inaccurate product descriptions


• incorrect commodity (HS) codes


• incomplete or inconsistent commercial invoices


• missing or mismatched EORI and importer details


• incorrect declared value


• confusion between country of dispatch and country of origin


• missing licences, certificates, or permits


• restricted or prohibited goods


• non-compliant ISPM 15 wood packaging


• Incoterms confusion over who is responsible for duties

Each of these is worth understanding in turn, because the fix is almost
always simple once you know what customs are looking for.

Commercial invoice mistakes

The commercial invoice sits at the foundation of customs clearance. It is
the primary document authorities use to assess duty, verify origin, and
confirm the value of a consignment. If it is incomplete or inconsistent
with the rest of the shipment, clearance stalls while authorities ask
questions.

A complete commercial invoice should clearly show the full names and
addresses of both sender and receiver, EORI or tax numbers where required,
a detailed description of the goods, the commodity code, the country of
origin, the value and currency, the quantity, the agreed Incoterms, and
the reason for export.

The single most important principle is consistency. Every figure and
detail on the invoice must match the customs declaration and the actual
contents of the pallet. If the invoice states one value and the
declaration states another, that gap alone can trap the shipment. A brief
check that the invoice, packing list, and declaration all agree takes a
few minutes and prevents days of delay.

One common valuation trap is worth flagging: when freight and insurance
costs are bundled into a single invoice total, customs may be unable to
calculate the dutiable value correctly. Depending on the Incoterms used,
this can lead to overpaid duty or a valuation query that holds the
shipment until corrected figures are provided.

Commodity code (HS code) errors

Every product moving internationally must be classified under a
commodity code, also known as a tariff or HS code. In the UK, import classifications
run to ten digits, and the UK Trade Tariff contains over 200,000 of them.
This single code determines the duty rate, the VAT, whether any licences
are required, and whether restrictions apply.

Getting it wrong is one of the most common and costly mistakes in
international shipping. A wrong code can mean overpaid or underpaid duty,
and underpayment can trigger a post-clearance demand from HMRC plus
interest and penalties. In serious cases it can lead to a compliance
investigation affecting past and future shipments.

A particularly common error is copying the code a supplier provides
without checking it. A supplier’s code — especially on invoices from
outside the UK — is often based on their own country’s export tariff and
may not match the correct UK import code. The legal responsibility for
declaring the right code sits with the importer, not the supplier. It is
always worth verifying the code against the official UK Trade Tariff
before shipping.

Wrong or missing EORI and importer details

Both the exporter and, in most cases, the importer need a valid
EORI
(Economic Operators Registration and Identification) number. For shipments
into the UK, the importer needs an active GB EORI — without one, clearance
cannot proceed.

A subtler problem catches out even experienced shippers. If the company
name and address on the commercial invoice do not exactly match the
details registered against the EORI number, automated customs systems can
reject the mismatch and hold the cargo until it is resolved. It is worth
confirming that EORI details are active and that they match your paperwork
exactly before dispatch, rather than discovering the problem when the
shipment is already stuck.

Incorrect declared value

Declared value sits at the heart of how customs assess duty and VAT, so it
attracts close attention. A value that looks too low invites suspicion of
under-declaration, while an inconsistent value across documents triggers a
query.

Under-declaring value — whether deliberately or by mistake — is a serious
issue that can lead to penalties, not just delays. Equally, failing to
include freight or insurance in the customs value where the Incoterms
require it can result in an inaccurate declaration. The safest approach is
to declare the true transaction value, make sure it is identical across
all documents, and break out freight and insurance costs clearly where
relevant.

Country of origin and rules of origin

This is one of the most widely misunderstood areas of international
shipping, and a common reason businesses either overpay duty or run into
compliance problems.

The country of origin is not necessarily the country a shipment is sent
from. Origin is the country where the goods were wholly produced or
underwent their last substantial transformation. A pallet dispatched from
Germany does not automatically have German origin if the goods were made
elsewhere.

This distinction matters because the UK has trade agreements with many
countries that offer preferential (reduced or zero) duty rates — but only
for goods that genuinely meet the rules of origin for that agreement. A
common and costly assumption is that because goods are shipped from a
country the UK has an agreement with, they automatically qualify. They do
not. Under the UK-EU Trade and Cooperation Agreement, for example, goods
only qualify for zero tariff if they meet specific product rules, and a
product assembled from a high proportion of non-originating parts may not
qualify even if final assembly took place locally.

To claim a preferential rate, you generally need proof of origin
documentation, such as a statement on origin, from your supplier. Claiming
preference without the goods actually meeting the criteria is risky: if
HMRC cannot verify the claim, it can demand back-duty on relevant
shipments going back up to three years. It is far safer to confirm genuine
origin and hold the supporting evidence than to assume eligibility.

Missing licences, certificates, or permits

Some goods need additional documentation before they can legally enter
another country. If those documents are missing, the shipment is very
likely to be held or refused.

Depending on the goods and destination, this can include import or export
licences, health certificates, phytosanitary certificates, or proof of
origin. Additional checks are particularly common for food products,
plants and wood products, chemicals, medical goods, animal products, and
other controlled goods. A shipment containing certain wooden products, for
instance, may require phytosanitary certification before entering some
countries.

Requirements vary significantly between destinations, so it is always
worth checking what the specific country requires well before shipping
rather than discovering a gap at the border.

Restricted and prohibited goods

Border inspections sometimes uncover goods that are prohibited,
restricted, or that require special approval. This can lead to refusal,
seizure, fines, return of the goods, or in serious cases destruction.

Restricted and prohibited goods
vary by country, but commonly include hazardous materials, certain
chemicals, weapons, counterfeit goods, alcohol and tobacco, controlled
medicines, and uncertified animal or plant products. Some of these are not
banned outright but require additional declarations, certificates, or
licences before they can be imported. If you are unsure whether your goods
are restricted in the destination country, it is always safer to check
before booking than to risk seizure later.

ISPM 15 pallet and wood packaging failures

The most common physical reason a pallet is rejected has nothing to do
with the goods on top — it is the wood underneath.

ISPM 15 is the international standard requiring solid wood packaging —
pallets, crates, and dunnage — used in international trade to be
heat-treated and stamped with the official IPPC mark. The rule applies to
wood packaging moving between Great Britain and other countries, including
the EU. Customs officers actively look for the mark as proof of treatment,
and a pallet that fails can hold up an entire consignment regardless of
how perfect the paperwork is.

Several points catch businesses out:

• 
  The IPPC mark must be clearly visible on at least two opposite sides. If
  it is hidden under stretch wrap or labels, customs cannot verify it, and
  an unverifiable mark is treated as a missing one.
  


• 
  Hand-drawn or altered marks are not accepted and can lead to automatic
  rejection.
  


• 
  Plywood, OSB, and plastic pallets are exempt, which is why some
  exporters switch to them for high-risk or high-frequency routes.
  


• 
  Condition matters. Even a compliant pallet can be rejected if it carries
  bark, oil stains, debris, or visible pests.
  


• 
  Enforcement is strictest for destinations such as the United States,
  Australia, China, and Canada.
  

Because ISPM 15 problems cannot be fixed once the pallet has been
collected, this is firmly a pre-dispatch check. For a full breakdown, see
our
ISPM 15 compliance guide.

Incoterms confusion — who pays the duty?

Incoterms
define who is responsible for each stage of the shipment, including duties
and import clearance. Confusion here does not usually cause an outright
rejection, but it regularly causes delays, unexpected bills, and refused
deliveries when neither party realises they were responsible for
clearance.

The three that cause the most confusion are:

• 
  EXW (Ex Works) — the buyer takes responsibility almost
  from the seller's door, including export and import formalities.
  


• 
  DAP (Delivered at Place) — the seller delivers to the
  destination, but the buyer is responsible for import duties and VAT.
  


• 
  DDP (Delivered Duty Paid) — the seller takes
  responsibility for everything, including import duties and clearance in
  the destination country.
  

The most common real-world problem is a buyer who does not realise that
under DAP or EXW, they are the importer of record and liable for the duty.
The shipment arrives, a duty bill lands, nobody is prepared for it, and
the pallet sits in a depot accruing storage charges while the issue is
sorted out. Agreeing Incoterms clearly in advance — and making sure both
sides understand what they mean — prevents this entirely.

Physical customs inspections

Not every pallet is physically inspected, but customs can select any
shipment for examination. Inspections may be entirely random, or they may
be triggered by incomplete documentation, values that look inaccurate,
suspected restricted goods, or inconsistencies in the paperwork.

During an inspection, customs may open the shipment, verify quantities,
inspect the packaging, review the paperwork, and request additional
information. It is worth being realistic about this: even a perfectly
prepared, fully compliant shipment can be selected for a random check and
delayed as a result. Good preparation dramatically reduces the chance of a
hold, but it cannot eliminate the possibility of a random inspection
entirely.

What happens if a pallet is stopped

If a shipment cannot clear customs, the outcome depends on the issue and
the destination country’s rules. The shipment may be delayed pending
additional documents, undergo further inspection, incur storage charges,
be returned to the sender, be refused entry, or require corrected customs
declarations. It may also face additional duties or penalties, and in
serious cases involving prohibited goods, customs may seize or destroy it.
Depending on the route and location, storage, demurrage, or handling
charges may begin accruing while the shipment is held awaiting customs
release — and these can add up quickly.

Beyond the direct cost, a border hold creates knock-on problems for
delivery schedules and customer orders — which is often the more damaging
consequence for time-sensitive freight.

An important change for EU shipments in 2026

If you ship low-value goods to the EU, there is a significant change to be
aware of. From July 2026, the EU is removing its €150 duty de minimis
exemption. Previously, goods valued under €150 could enter the EU
duty-free. Once the change takes effect, every import into the EU becomes
subject to customs duty regardless of value.

For e-commerce businesses and anyone shipping smaller consignments to the
EU, this means duty now needs to be factored into pricing and paperwork on
shipments that were previously exempt. It is worth reviewing your EU
shipping process ahead of the change rather than being caught out
afterwards.

How to prevent border problems

Good preparation is the single best defence against customs delays and
rejected pallets.

Make sure all paperwork matches. Quantities, values,
weights, descriptions, and consignee details should be identical across
the invoice, packing list, and customs declaration. Inconsistent paperwork
is one of the quickest ways to trigger an inspection.

Use specific product descriptions. State what the goods
are, what they are made from, and what they are used for. “Metal machine
components” clears far more easily than “parts.”

Verify your commodity codes. Confirm the correct UK code
against the Trade Tariff rather than relying on a supplier’s export code,
and check whether any licences or restrictions apply.

Confirm EORI details are active and matching. Check that
the name and address tied to the EORI match the invoice exactly.

Get origin right. Confirm where the goods genuinely
originate, and only claim preferential rates when you hold the supporting
evidence.

Agree Incoterms clearly. Make sure both parties know who
is responsible for duties and import clearance before the shipment moves.

Get the pallet right. For international wood packaging,
confirm ISPM 15 compliance and that the IPPC mark is visible on at least
two opposite sides after wrapping.

Keep records and photographs. Before collection,
photograph the pallet, keep copies of invoices and customs documents, and
save booking and tracking information. This helps if customs request
clarification or a dispute arises later.

On more complex routes or higher-value shipments, many businesses also use
a customs broker to reduce the risk of declaration errors and keep
clearance moving.

Border-ready checklist

Before dispatching international pallet freight, check that:

• product descriptions are accurate and specific


• the commercial invoice is complete and consistent


• shipment values are correct and match the declaration


• commodity codes are verified against UK classifications


• EORI numbers are active and match the paperwork


• country of origin is correct and preference claims are supported


• any required certificates or licences are included


• Incoterms are agreed and understood by both parties


• ISPM 15 wood packaging requirements are met


• restricted goods rules have been checked for the destination


• all paperwork matches the shipment exactly

A short review before booking can prevent significant delays and costs
later.

What we can and cannot control

To keep responsibilities clear, it is worth setting out where our role
begins and ends. We can help you understand what documentation is usually
required, guide you through preparing your shipment, and support you
throughout the booking process.

What we cannot control is the customs authority’s decisions. Duty
assessments, the timing of clearance, whether a shipment is selected for
inspection, and final release all sit with customs in the destination
country. Responsibility for declaring goods accurately, holding the right
certificates, and ensuring the shipment is compliant ultimately rests with
the shipper. Our role is to make that process as smooth and well-informed
as possible.

Final thoughts

International pallet shipping does not need to be complicated, but customs
clearance depends heavily on accurate information and proper preparation.
Most border problems happen for the same handful of reasons: inaccurate
shipment details, incomplete or inconsistent paperwork, undeclared or
restricted goods, missing certificates, and non-compliant wood packaging.

With accurate declarations, consistent paperwork, the right commodity
codes, correct origin information, and a compliant pallet, international
shipments move through customs far more smoothly and with far fewer
delays.

At Pallet2Ship, we help businesses
move freight internationally
with straightforward guidance and reliable support throughout the process.
If you are unsure what documents your shipment requires, our team can help
you understand the requirements before booking, helping reduce the risk of
delays, rejected pallets, and unnecessary customs issues later on.