Every cross-border movement is a declaration to at least two authorities. The declaration says what the goods are, what they are worth, where they originate and whether anything restricts them. Getting those four answers right — and being able to evidence them afterwards — is the substance of customs compliance.
Who does what
Declarations are filed by licensed customs brokers appointed for the relevant jurisdiction. Global Marine Logistic coordinates that filing: we prepare and verify the underlying data, hold the documents together, brief the broker and follow the entry through to release.
Legal responsibility for the accuracy of a declaration sits with the declarant — normally the importer or exporter of record. That responsibility cannot be delegated to a forwarder or broker, which is why we check the data with you rather than simply passing it on.
Classification
Every product is assigned a tariff code under the Harmonized System. The code determines the duty rate, whether any preferential rate can be claimed, and which prohibitions, licences or controls apply.
Classification follows the composition, function and form of the goods, not the marketing name. Where a product is genuinely borderline, an advance ruling from the authority gives certainty and protects against a retrospective assessment.
Valuation
Duty is usually charged on the customs value, most often the transaction value: the price actually paid or payable, adjusted for specified additions such as assists, royalties, commissions and, depending on the country's basis of valuation, freight and insurance to the place of importation.
Related-party pricing, retrospective discounts, free-of-charge samples and replacement goods all need care, because the invoice value alone may not be the customs value.
Origin
- Non-preferential origin: where the goods were produced or last substantially transformed. It drives marking, quotas and trade measures such as anti-dumping duty.
- Preferential origin: a stricter test under a specific trade agreement, which can reduce or eliminate duty where the rule of origin is met and the correct proof or statement is held.
- Evidence: a preference claim must be supportable at audit. Country of shipment is not origin, and supplier declarations should be on file before the claim is made.
Controlled, restricted and prohibited goods
- Dual-use and export-controlled items requiring a licence before shipment.
- Sanctions and denied-party screening against the parties and the destination.
- Food, plant, animal and pharmaceutical products with health, phytosanitary or veterinary requirements.
- Dangerous goods, which carry transport-mode rules in addition to customs rules.
- Intellectual property enforcement at the border, where suspected counterfeits can be detained.
Duty relief and special procedures
Depending on the jurisdiction, procedures exist to defer, suspend or reclaim duty: bonded warehousing, transit procedures, inward and outward processing, temporary admission for goods that will re-export, free zones, and drawback on re-exported goods.
These procedures carry conditions, authorisations and record-keeping obligations. They are worth evaluating when duty is material and the flow is repeatable rather than one-off.
Supply chain security programmes
Customs authorities operate voluntary trade partnership programmes that ask participants to document and maintain supply chain security practices in exchange for facilitation benefits. In the United States this is the Customs-Trade Partnership Against Terrorism (C-TPAT); elsewhere, comparable Authorised Economic Operator schemes serve a similar purpose.
Typical themes across these programmes include business partner screening, container and trailer inspection and seal control, physical and access security, personnel vetting, procedural security around documentation, information technology security, and security training and threat awareness. Adopting these practices strengthens a supply chain whether or not a company chooses to apply for membership.
This section is educational. It describes how such programmes work generally and is not a statement that any particular certification or membership is held.
Record keeping and audit
Customs records must generally be retained for a period set by each jurisdiction, commonly several years, and must be produced on request. Keep declarations, invoices, transport documents, origin evidence, licences and correspondence together per shipment so an entry can be reconstructed.
Where an error is found, most authorities provide a voluntary disclosure route. Correcting proactively is normally treated far more favourably than the same error found at audit.
Practical habits that prevent holds
- Maintain a product master with agreed classifications, origins and values rather than re-deciding per shipment.
- Screen new counterparties and destinations before quoting, not after booking.
- Send documents to the broker ahead of arrival so queries surface before the cargo does.
- Flag anything unusual — samples, repairs, returns, prototypes — because these are the entries most often misdeclared.
- Review duty outcomes periodically to check that preferences claimed are still supportable.
