The rule that orders everything
All of this paperwork exists to prove one single thing: that the goods that left the supplier, travelled, were declared and entered your warehouse are the same goods, with the same value and the same purpose. When two documents tell different versions of the same cargo, the problem is not bureaucratic — it is tax-related, and it shows up months later as a denied credit, a penalty or a question.
Commercial invoice: the document that carries money
The commercial invoice is the basis of the customs value. It must show seller and buyer, a product description consistent with the tariff classification, quantity, unit, unit and total price, currency, delivery terms (Incoterm) and bank details. Two details usually surface here: a proforma invoice does not replace the commercial one, and any discount, freebie or price adjustment must be visible — a value "hidden" in an annex is a mismatch, not a saving.
Packing list: what is in each piece
The packing list says how the goods are distributed among boxes, pallets and containers: marks, numbers, gross and net weight, dimensions and contents. It is the document the warehouse checker uses and the one that has to agree with the transport document. If the packing list and the bill of lading or air waybill disagree on weight or piece count, the physical inspection will find the difference first.
Bill of lading / air waybill: the transport contract
By sea it is the bill of lading (BL); by air, the air waybill (AWB). Besides being the contract of carriage, it is a receipt for the goods and — in the case of an original BL — a document of title. It carries shipper, consignee, notify party, load and discharge ports or airports, cargo description, container numbers and seals. A wrongly filled consignee is one of the most common causes of cargo that arrives and cannot be picked up.
Import declaration: the act of declaring
It is the electronic document filed in the Single Window. Today the reference is the DUIMP, being rolled out and running alongside the previous model until the transition completes; what does not change is the function: it consolidates product, tariff classification, value, freight, insurance, origin, Incoterm and the details of exporter and carrier into one declaration signed by whoever answers for the clearance. Everything from the previous items converges here, and here a mismatch becomes a matter of record.
Certificate of origin: when a trade deal is worth money
Issued by an authority in the country of origin, it is what allows preferential tariff treatment. It is only valid if the product description, container or voyage number and date match the rest of the file — and if the shipment takes place within the certificate validity. Asking for the document after shipment is the error that costs the benefit.
Licences, registrations and conformity certificates
Before any other paper, check whether the product requires consent from a technical agency — health, agriculture, environment, metrology, telecoms or energy — and whether it requires registration, listing or labelling in the local language. When that requirement exists, clearance depends on a document that is not customs and does not belong to the tax authority; when it is ignored, the cargo arrives, sits still and does not leave.
Foreign exchange, payment and proof
The FX contract links the operation to the books: it ties the foreign funds to the import declaration and is what supports the cost in local currency. Wire confirmation, contract, invoice and declaration must all point to the same operation and the same amount. A payment made outside the documentary arrangement — an advance to a supplier with no link to the file, for instance — is the part nobody remembers at the time and the first the tax authority asks about.
Inbound invoice and what happens after clearance
After clearance the goods must be booked: an inbound tax invoice (or a transfer/processing one, depending on the case) carrying the same classification, the same customs value plus duties, and the same quantity. That is where ICMS and PIS/COFINS credits are born — and where a difference in tariff code between the declaration and the internal invoice turns into a recurring problem.
What to check before paying the supplier
A practical order: confirm the product can enter (licences and registrations), that the commercial description fits the intended classification, that the Incoterm is written on the invoice, that the consignee and notify party on the transport document are right, that the certificate of origin was issued before shipment, and that the bank details match the FX contract you plan to use. Most rework concentrates in those six points — and none of them is cheaper to fix after the cargo is in Brazil than before.
Introductory guides to international trade processes, risks and decisions. Content is not a substitute for operation-specific technical, legal, tax or customs advice.