Why documents decide whether cargo moves
Customs officers, carriers and banks cannot see your product quality or your agreement with the supplier. They see documents. A missing certificate can hold a container at the port, a mismatched weight can trigger an inspection, and a small wording error can cause a bank to refuse payment under a letter of credit. Most documentation problems are not exotic; they are inconsistencies and omissions that someone could have caught before the goods left the factory.
This checklist covers the core documents, the supporting certificates and permits that may apply, how to handle HS codes, how to keep documents consistent and how letters of credit raise the stakes. Requirements differ by country, product and trade term, so treat it as a framework to adapt, not a legal list. Our trade documentation service exists to help with exactly this preparation and cross-checking.
The core shipping documents
Almost every international shipment needs these. Prepare them from a single set of agreed shipment data.
Commercial invoice
The seller’s bill for the goods and the main document for customs valuation. It should show seller and buyer, invoice number and date, a clear goods description, HS code, quantity, unit price, currency, total, the Incoterms® rule with named place, payment terms and country of origin.
Packing list
Lists what is in each package without prices: package count and type, contents, gross and net weights, dimensions, shipping marks and container or seal numbers. Customs and the consignee use it to check the physical shipment against the invoice.
Bill of lading or sea waybill
The sea carrier’s receipt, evidence of the contract of carriage and, if issued as an original “to order” bill, a document of title needed to collect the cargo. A sea waybill is non-negotiable. Check the shipper, consignee, notify party, “shipped on board” notation and any claused remarks.
Air waybill
The air carrier’s receipt and contract of carriage. It is not a document of title, so the consignee is named and goods are released against identification. Forwarders often issue a house waybill under the airline’s master waybill.
Road or rail consignment note
For road shipments between countries that apply the CMR Convention, a CMR note evidences the contract of carriage. Rail and multimodal shipments use their own consignment documents. Terms and signatures matter here too.
Insurance certificate
Proof of cargo insurance, required when the trade term obliges the seller to insure (CIP, CIF) or when a letter of credit calls for it. Check the insured value, cover level, route and beneficiary. Even when no one requires it, consider insuring.
Certificates and permits that may apply
Whether you need these depends on the product, the origin and the destination. Confirm before production, because some take time or must be obtained before shipment.
- Certificate of origin, non-preferential (general) or preferential, to claim reduced duty under a trade agreement
- Pre-shipment inspection or quality certificate from an independent inspection body
- Certificate of analysis for chemicals, food, cosmetics and similar goods
- Phytosanitary, health or veterinary certificates for plants, food and animal products
- Fumigation or heat-treatment evidence for wooden packaging (ISPM 15 marking)
- Import permit or licence, where the destination requires prior authorization
- Certificate of conformity or product registration for regulated goods such as electrical items, toys or medical products
- Export licence or dual-use authorization, if the goods or end-use are controlled
- Dangerous goods declaration and safety data sheet for hazardous cargo
- Legalization, apostille or chamber attestation, where the buyer or importing authority demands it
HS codes: classify once and use them everywhere
The Harmonized System (HS), maintained by the World Customs Organization, is the international product nomenclature. Its first six digits are common to most countries, and national tariffs add further digits for duty rates and statistics. The classification of your goods determines the duty rate, whether import restrictions apply and which certificates are needed. The WCO revises the HS on a cycle of several years, so confirm which version your customs authority uses.
Do not accept the supplier’s HS code without checking it against the destination’s tariff, because a code that is right for the export country may not be the right one at import. Where the classification is uncertain, ask the customs authority or a licensed customs broker. Keep the same code and goods description on the invoice, packing list and customs declaration. Misclassification can lead to wrong duty payments, delays and penalties. Our guide to import cost factors covers duties alongside the other landed-cost items.
Cross-check before the goods leave
Customs treats mismatches as a risk signal, and banks treat them as grounds to refuse. Compare the drafts of every document for these fields.
- Exact legal names and addresses of seller, buyer, consignee and notify party
- Goods description and HS code, worded the same everywhere
- Quantities and units of measure
- Gross and net weights and number of packages
- Shipping marks, container, seal, vessel, flight or truck numbers
- Invoice number, date and purchase order or letter of credit reference
- Incoterms® rule and named place
- Currency, unit prices and totals
- Country of origin
- Dates in sequence: invoice, insurance cover, shipment, presentation
Letters of credit and discrepancies
A letter of credit (L/C) is a bank’s undertaking to pay the seller, issued at the buyer’s request, against a complying presentation of the documents the credit lists. Banks examine documents, not goods. Most credits follow the ICC’s UCP 600 rules, under which data in a document need not be identical to the credit but must not conflict with it or with other required documents. The invoice description of goods must correspond with the credit, and presentation generally has to be made within 21 days after shipment but before the credit expires, unless the credit says otherwise.
A document that fails these tests is a discrepancy. The bank may refuse it, charge a fee, or ask the buyer to waive the discrepancy, which gives the buyer leverage and delays payment. Typical causes include late shipment or presentation, a goods description that differs from the credit, an amount or quantity beyond the credit, a bill of lading without an on-board notation or with clauses, mismatched names or weights, missing or insufficient copies and insurance cover that is not effective from the shipment date. Check the credit terms before production, ask for amendments before shipping, and have a draft set of documents reviewed in advance. Our Incoterms guide shows how the trade term affects which documents a credit calls for.
A simple document workflow
Build the habit once and reuse it on every order.
Agree the document list in the contract
State which documents the seller provides, how many originals and copies, the language, and any legalization or attestation required. Put it in the purchase order, not in an email.
Confirm classification and permits early
Settle the HS code and check import and export permits, conformity requirements and any sanctions or export-control restrictions before production starts, not before shipping.
Draft every document from one data sheet
Use a single master record of names, goods description, quantities, weights and references so each document starts from the same data.
Review drafts before shipment
Compare the commercial invoice, packing list, certificates and transport document line by line. If a letter of credit applies, send the drafts to the bank for a pre-check.
Send documents in time for clearance
Know when your broker and the carrier need them. Late originals can leave cargo waiting and generating storage and demurrage.
Keep a complete file
Customs authorities may require you to retain trade records for a set period, which varies by country. Keep the full set together with payment and correspondence records. Our import and export coordination service can help keep that file in one place.
Compliance caveat
This checklist is general information, not legal or customs advice. Trade restrictions, sanctions, export controls, product standards and documentary requirements vary by country, commodity and counterparty and change over time. Confirm the requirements for your specific shipment with the relevant authorities, a licensed customs broker or a legal adviser, and do not ship where trade is not legally permissible.
Trade documentation questions
What is the difference between a commercial invoice and a packing list?
The commercial invoice states what is sold and at what price and is used for customs valuation. The packing list describes the physical shipment (packages, weights, dimensions, marks) without prices. Customs compares the two, so they must agree.
Is a bill of lading the same as an air waybill?
No. Both are transport documents, but an original “to order” bill of lading is a document of title that may be needed to collect sea cargo. An air waybill is a non-negotiable receipt and contract of carriage, so it is not a document of title.
Do I always need a certificate of origin?
Not always. It is required by some destinations, requested by some buyers and called for by some letters of credit, and a preferential certificate can support a reduced duty rate under a trade agreement. Check the destination’s rules and your contract.
What happens if documents do not match?
Customs may hold or inspect the shipment, correct the declaration or apply penalties. Under a letter of credit, the bank can refuse the presentation as discrepant and delay payment until the issue is fixed or waived.
Who is responsible for providing the documents?
It depends on the trade term and the contract. Generally the seller provides the commercial documents and export papers, while the buyer deals with import clearance, but the contract should list each document and who supplies it.
Related services and articles
Trade Documentation
Help preparing and checking the paperwork for each shipment.
Import & Export Coordination
Coordinating suppliers, carriers and clearance.
Incoterms Guide for Importers
Who does what under each of the eleven rules.
Air Freight vs Sea Freight
How the mode of transport changes your documents.
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