If you import a commercial shipment from China — from a single pallet to a full container — a packing list will be in every one of your consignments. It's one of the core shipping documents alongside the invoice and bill of lading, and it's exactly where beginners stumble most: the figures don't match the invoice, the weight is understated, the number of packages is off — and the shipment gets stuck at customs. This article is for importing companies who want to understand the document, not just forward whatever the supplier sent. The full list of clearance documents is in what documents you need to import from China.
What a packing list is and why it exists
A packing list (packing specification) is the document that describes the physical structure of the cargo: how many packages, what's in each, what weight and volume. If the invoice answers "how much does it cost," the packing list answers "how is it physically packed and how much does it weigh." The seller (factory) prepares it, and everyone in the chain needs it:
- Customs — to match the declared against the actual at inspection.
- Carrier and warehouse — to calculate space, weight, tariffs and plan loading.
- You — to check completeness at receipt without opening every box.
- Insurer — to assess the cargo and settle a claim if it's damaged.
How the packing list differs from the invoice
This is the most common question. The documents are a pair but serve different purposes: the commercial invoice is commerce (prices, amounts, payment terms, Incoterms), while the packing list is logistics and physics (packages, weight, volume, marks). The key rule: data that appears in both documents must match to the digit — quantity, item numbers, invoice number. A mismatch between them is a red flag for customs and the most common cause of delay.
A customs officer reads the invoice and packing list together. If the invoice says 1,000 units and the packing list says 1,020, that's not "a detail": it's grounds for a full inspection and suspicion of undervaluation.
What a packing list must contain
- Seller and buyer details — names, addresses, as in the contract.
- Number and date of the document, referencing the matching invoice and contract.
- Item description line by line — name, item number, and the HS code where needed.
- Quantity — units per box and in total.
- Number of packages — boxes/pallets/crates, numbered.
- Net and gross weight — per line/package and total.
- Volume (CBM) — package dimensions and total volume in cubic metres.
- Shipping marks — how packages are marked so they can be identified.
For consolidated (LCL) and multi-line shipments the per-package breakdown matters most — which item is in which box. Without it, receipt turns into opening the whole container.
Net, gross and volume: why it's critical
Three figures on the packing list directly affect your money:
- Gross weight — freight is calculated from it, and it decides whether the cargo fits the container by weight. Understated weight on paper vs actual at the terminal = a problem at loading and at customs.
- Volume (CBM) — for consolidated (LCL) cargo the tariff is often charged by volume. An error in dimensions = overpayment or a dispute with the carrier.
- Net weight — the basis for clearing a range of goods (metal, chemicals) where duty/statistics are tied to weight.
How these figures fit into a container we showed with the container loading calculation and in container shipping from China.
Common errors that get stuck at customs
- Mismatch with the invoice — different quantity, different item numbers, different invoice number.
- Understated gross weight — "to make it cheaper," but the actual weight at the terminal still exposes the discrepancy.
- No per-package breakdown — for consolidated and multi-line shipments this stalls an inspection.
- Generic description instead of line items — "goods" instead of specific names and item numbers.
- No marks — packages can't be identified, receipt is blind.
Checking these figures before shipment is part of quality control and pre-shipment inspection: the inspector verifies the actual quantity, weight and marks against the documents at the supplier's warehouse.
What to check before shipment
- Data in the packing list and invoice match to the digit.
- Package count, net/gross and CBM match the real cargo.
- There's an "item → box" breakdown for multi-line shipments.
- Marks on the packages match the document.
- The item description is enough to determine the HS code.
Prepare documents without customs delays
We handle the document flow of China imports: we check the packing list, invoice and bill of lading for mismatches before shipment, verify the actual shipment against the documents at the supplier's warehouse, and prepare the clearance set for a company. You won't discover a discrepancy at customs with the container racking up demurrage.
This is part of document preparation and foreign-trade consulting.
Check the document set for your shipment: email contact@silkwaysourcing.com or message WhatsApp +380 97 883 4765 — send the invoice and packing list and we'll flag the risks before shipment.
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*Sources (verified; check for current editions as of 2026): International Chamber of Commerce — Incoterms 2020; shipping-document requirements per the destination country's customs code.*
