Trade & Customs
Import & Export Documentation: A Practical Guide
The core documents behind every international shipment, what each one does, and the mistakes that cause customs delays.
YMS Global Freight · · 7 min read
Most shipment delays are not caused by ships or aircraft — they are caused by paperwork. Missing, inconsistent or late documents can hold cargo at the port while storage charges build up. Knowing what each document does makes it much easier to get them right.
The core commercial documents
Commercial invoice
The seller’s bill to the buyer. Customs uses it to establish the value of the goods, which drives duties and taxes. It should show the seller and buyer, a clear description of the goods, quantities, unit and total values, currency and the Incoterm.
Packing list
Details how the goods are packed: number and type of packages, marks and numbers, net and gross weights and dimensions. It must match the invoice and the transport document.
Transport documents
- Bill of lading (B/L): the ocean transport document. An original negotiable B/L can also act as a document of title to the goods.
- Sea waybill: a non-negotiable alternative to the B/L when title does not need to be transferred.
- Air waybill (AWB): the air cargo transport document and receipt, identified by an 11-digit number.
- Road consignment note: the document accompanying goods moved by truck.
Documents that depend on the goods or destination
- Certificate of origin — proves where goods were produced; often required to claim preferential duty rates.
- Import or export licences and permits — for controlled or regulated goods.
- Safety data sheet (SDS) and dangerous goods declaration — for hazardous materials.
- Phytosanitary and fumigation certificates — for plant products and wooden packaging.
- Insurance certificate — when cargo insurance is part of the sale terms.
Common mistakes that cause delays
- Vague descriptions such as "spare parts" or "samples" instead of specific product descriptions.
- Weights or package counts that differ between the invoice, packing list and B/L.
- Incorrect or missing HS codes.
- Consignee details that do not match the importer of record.
- Certificates arranged after the goods have already shipped.
A simple pre-shipment checklist
- Invoice and packing list match line by line
- HS codes confirmed for each product
- Permits or certificates obtained before booking
- Consignee and notify party details verified
- Incoterm agreed and stated on the invoice
A freight forwarder or customs broker can review documents before cargo is shipped — the cheapest point at which to fix a problem.
