The Commercial Invoice and the Packing List are the two basic documents you cannot do without for customs declaration, customs clearance and tax rebate. Understand what each one governs and which fields are most error-prone, and you can save yourself a trip through the amendment process.
The Commercial Invoice governs "money"
The Commercial Invoice is the price proof issued by the exporter to the importer.
Customs uses it to determine the dutiable value and calculate duties; banks use it to settle foreign exchange; tax authorities use it to verify the tax rebate.
Core fields: names and addresses of buyer and seller, description of goods, quantity, unit price, total price, currency, terms of trade, country of origin.
It serves as both a transaction voucher and a customs declaration voucher, and the two uses must be filled in consistently.
The Packing List governs "goods"
The Packing List explains how the goods are packed and usually does not show prices.
Core fields: total number of packages, gross and net weight per package, volume, type of packaging, marks, carton numbers.
Customs exams, overseas warehouse receiving and Last Mile delivery all rely on it to check the physical goods.
When loading a container, the Packing List is also the basis for checking the cargo volume inside.
A Proforma Invoice cannot be used as a customs declaration invoice
A Proforma Invoice is used for quotations and requesting advance payment; it is conditional and informal.
Customs declaration and tax rebate must use a Commercial Invoice; the two have different uses and cannot substitute for each other.
Customers often treat a Proforma Invoice as a contract attachment, but a formal Commercial Invoice must still be issued separately for customs declaration.
The fields most easily filled in wrong on the two documents
| Field | Common error | Consequence |
|---|---|---|
| Description of goods | Writing vague words like "accessories" or "samples" | Customs cannot classify it, exam likely |
| Unit of quantity | Invoice says "cartons", Packing List says "pieces" | The two documents do not match |
| Currency | Amount filled in USD, currency written as RMB | Dutiable value calculated wrong |
| Terms of trade | FOB and CIF mixed up | Freight and insurance attribution unclear |
| Weight and volume | Gross weight simply copied from net weight | Freight calculation deviates |
Why one wrong word means an amendment
The information on the four documents — customs declaration, BOL, invoice and Packing List — must be consistent with one another.
If any one does not match the customs declaration, it may trigger a Customs Exam, rejection or even administrative penalty.
To amend an already declared customs declaration, you must submit an explanation to customs and apply for an amendment, and the shipping schedule is delayed accordingly.
If the BOL has already been issued and then changed, it also involves the carrier's amendment process, with even higher time costs.
The price and quantity on the invoice and Packing List also directly determine the amount declared for the tax rebate.
So the least troublesome approach is: check word by word before issuing the documents, and get it right the first time.
