Most customs delays are not caused by the authorities being difficult. They are caused by a document that does not match another document. The good news is that this makes them largely preventable — but only if the checking happens before the cargo arrives, when a correction is still cheap.
Here are the five causes we see most often.
1. The invoice and the packing list disagree
This is the single most common cause. The commercial invoice says 400 cartons; the packing list says 410. Or the invoice describes "cotton garments" and the packing list says "textiles". Any inconsistency between the two invites a question, and a question means the entry stops moving until someone answers it.
Before shipping, put the two documents side by side and check that quantity, description, weight and value agree exactly.
2. The wrong HS code
The Harmonised System code determines the duty rate, the permits required and whether the goods are restricted. Choosing a code because it is close enough is a false economy: an incorrect classification can mean an underpaid duty, a penalty, and a reclassification that holds the cargo while it is resolved.
Classification is genuinely difficult for anything that is not obvious. It is worth getting a second opinion before the first shipment on a new commodity, not after.
3. A declared value that does not stand up
Customs valuations are checked against what similar goods normally cost. A value that sits well below the expected range triggers a query, and the burden of proof sits with the importer. Keep the purchase order, the payment evidence and the contract to hand — if the value is genuine, being able to show it immediately is what turns a week into an afternoon.
4. A missing permit for a regulated commodity
Food, pharmaceuticals, chemicals, cosmetics, telecoms equipment and a long list of other categories need approval from a body other than customs. That approval takes its own time, and it cannot usually be obtained retrospectively while the cargo waits at the port.
Establish which agencies your commodity falls under before you order, not when the container lands.
5. Documents lodged after arrival instead of before
Even when everything is correct, timing matters. If the declaration is only prepared once the vessel has berthed, the clock on demurrage and storage is already running. Lodging the entry while the cargo is still in transit means clearance can begin on arrival rather than days afterwards.
For perishable cargo this is not an optimisation — it is the difference between selling the product and writing it off.
A short pre-shipment checklist
- Invoice and packing list agree on quantity, description, weight and value
- HS code confirmed for the actual commodity, not an approximate one
- Declared value supported by a purchase order and payment evidence
- Certificate of origin issued and consistent with the invoice
- Any commodity-specific permit or health certificate already in hand
- Transport document details match the commercial paperwork exactly
None of this is complicated. It is simply easier to do a week early than a week late.
If you would like a second pair of eyes on the documents for an upcoming shipment, send them over — we would rather find the problem now than at the border.