Import Document Checks: What One Typo Costs in Brazil

Transpose one digit of a container number on a pre-alert and you do not pay for one digit. In Brazil you pay for a CE Mercante correction, a container sitting at the terminal and an operator’s afternoon spent fixing what import document checks should have caught at intake. One error like that is annoying. What should bother an owner is that it repeats as fast as the volume grows.

Where the error is born: the same data typed three times

The pre-alert arrives from the overseas agent as a handful of PDFs: house and master B/L, commercial invoice, packing list, sometimes the certificate of origin. From there the same fields get retyped everywhere they are needed. Into the ERP, to open the file. Into the carrier’s portal, for the draft. Into the CE Mercante, the electronic bill of lading record every ocean shipment into Brazil must have in the Mercante system of Receita Federal, the country’s customs and tax authority, so the cargo exists for customs at all. Then the carrier’s and terminal’s invoices arrive and the cost side starts over.

Every keystroke is a chance to get it wrong. Hire another operator for more volume and you have mostly bought more retyping, errors included.

The fields that turn into problems are always the same:

• Container number, above all the check digit
• Gross weight and volume, which differ between packing list, B/L and what the terminal weighed
• NCM, the Mercosur tariff code (the HS code plus two digits), typed by someone who did not classify the product
• Ports of origin and destination, when the code does not match the name
• Currency and invoice total, with line items that do not add up
• Consignee name and tax ID (CNPJ), one character short

The document load keeps growing. Brazilian ports handled 164.6 million tonnes of containerized cargo in 2025, 7.2% more than in 2024, according to ANTAQ figures reported by Guia Marítimo. More cargo means more paper. Brazil’s foreign trade single window, the Portal Único, is meanwhile integrating its import cargo control module (CCT Importação) with the CE Mercante and with the DUIMP, the country’s new single import declaration. That raises enough questions that Sindicomis, the São Paulo forwarders’ and customs brokers’ union, runs a Q&A channel just for that integration. Once the systems are connected, data typed once travels everywhere, including the data you typed wrong.

What does a container with the wrong number cost?

It depends on when you find out. Under Receita Federal’s Normative Instruction 1,471/2014, an import CE Mercante can be amended without penalty until the vessel’s first berthing. After that, the fix becomes a formal correction request, a retificação. Receita Federal’s own Mercante manual lists the correction types and one detail worth remembering: while the request is under review, the bill of lading record is blocked.

A blocked record is cargo that does not clear. The container sits at the terminal accruing storage and burning free time, and the demurrage bill that lands weeks later gets argued with you, not the carrier. Add the operator hours spent opening the request, calling the terminal and explaining it to the client.

Run the numbers with your own volume. If 2% of your 300 monthly files go through a correction, that is 6 corrections. At two operator hours each, that is 12 hours a month of pure rework, before a single extra day of storage. Over a year, more than a full week of one operator goes to fixing what came in wrong.

The cost that never reaches the spreadsheet is the one you feel later. Your client never sees the overseas agent who sent the wrong number. Your client sees your name on the storage invoice.

What automated checks catch, and what still needs a person

A machine beats a person at the mechanical checks nobody has patience for:

• Container check digit (ISO 6346 makes it possible to test whether the number can exist)
• Port code against the UN/LOCODE table
• Currency code and date format, with dates in logical order
• Line items adding up to the invoice total
• Quantities and weights matching across packing list, invoice and B/L
• Duplicate document or a new version of the same B/L, so nothing is recorded twice

Judgment still needs a person. Classifying the tariff code of a new product. Deciding whether a gap between invoice and packing list is a supplier error or a real change in the shipment. Checking with the overseas agent whether the wrong number is on the pre-alert or the draft. The software raises the flag and your operator makes the call.

The number to watch is how many documents the team has to open. If the answer today is “all of them”, every new operator buys more hours of typing. If it becomes “only the ones the check flagged”, the same team absorbs more files.

The market is heading the same way. The CEOs of DCSA’s member carriers have committed to issuing 100% of bills of lading electronically by 2030, which means less PDF and more structured data. Until then, most pre-alerts arrive as a PDF attached to an email, and that is where the check has to happen.

Frequently Asked Questions

Which documents are checked on an import?

The basics are the commercial invoice, the packing list and the bill of lading (B/L or air waybill), checked against each other: quantities, weights, values, parties and container number have to match. Depending on the product, the certificate of origin and the import license come in too. On the cost side, the carrier’s and terminal’s invoices are checked against what was quoted.

How long can a CE Mercante be corrected without a formal request?

Under Brazil’s Normative Instruction RFB 1,471/2014, an import CE Mercante can be amended without penalty until the vessel’s first berthing. After berthing, the correction becomes a request reviewed by Receita Federal, with formal restrictions, and the bill of lading record stays blocked while it is under review.

What are the most common import document errors?

A container number with a transposed check digit, gross weight and volume that differ between documents, an incorrect tariff code, a port code that does not match the port name, a currency or invoice total that does not add up from the line items, and incomplete consignee details. Most of them are born when the same data gets retyped into different systems.

How Autodocs checks the fields before anyone opens the document

Autodocs takes the pre-alert by email, by API or straight from Tier2 Cargo. It identifies each document and pulls the fields with a confidence score and the source page, then runs the checks above: check digit, port code, currency, date order, totals. Your own rules go in the same place. Only the uncertain field goes to a person, and the clean record moves to your system by API or webhook.

The job changes from typing to reviewing. See how Autodocs works or talk to us.

Count how many times a container number gets typed in your operation today. Each one is a retificação waiting to happen.