Certificate of Origin (C/O) is one of the most important documents in import-export operations.

The C/O is used to determine the origin of goods and, in many cases, helps businesses benefit from preferential import tariffs under free trade agreements.

However, simply having a C/O does not mean that goods automatically qualify for tax reductions.

Businesses also need to check various factors such as HS codes, exporting countries, importing countries, rules of origin, types of C/O, and applicable trade agreements.

In this article, VICO Logistics will help you understand what a Certificate of Origin (C/O) is, its functions, common types of C/O, how to check them, and common mistakes businesses should avoid when using C/O in import-export.

1. What is a Certificate of Origin (C/O)?

C/O stands for Certificate of Origin.

Simply put, a C/O is a document used to prove that goods originate from a specific country, group of countries, or territory according to applicable rules of origin.

For example, a product shipped from China to Vietnam does not automatically mean the product originates from China.

Goods may be:

• Wholly produced in China;

• Manufactured using materials from multiple countries;

• Merely processed or packaged in China;

• Subject to multiple production stages across different countries.

Therefore, it is essential to distinguish:

The place from which goods are shipped is not always the place of origin.

To be recognized for origin and enjoy preferential tariffs under a trade agreement, goods must meet the rules of origin of that agreement.

2. What is the Function of a C/O in Import-Export?

A Certificate of Origin plays several vital roles in international trade.

2.1. Determining the Origin of Goods

A C/O helps prove where goods originate.

This is especially important for products with:

• Materials from multiple countries;

• Multiple production stages;

• Multiple suppliers;

• Processing activities across several nations.

The origin of goods depends not only on the exporting location but also on the actual production process.

2.2. Supporting Preferential Import Tariffs

This is the primary reason why many businesses care about C/O.

If goods:

• Meet the rules of origin;

• Have valid origin documentation;

• Fall within the scope of a trade agreement;

• Meet related conditions;

  Then the importer can benefit from special preferential import tariff rates.

  This can significantly reduce the overall cost of importation.

2.3. Supporting Trade Policy Implementation

Product origin can also relate to:

• Import policies;

• Quotas;

• Trade defense measures;

• Trade controls;

• Trade statistics;

• Market-specific requirements.

Therefore, a C/O is not merely a document used for tax reduction.

3. Difference Between Preferential and Non-Preferential C/O

C/Os can generally be divided into two main groups.

Type of C/O	Purpose
Preferential C/O	Proves origin so that goods can benefit from preferential tariffs under a trade agreement
Non-Preferential C/O	Proves the origin of goods without aiming for tariff preferences under an agreement

An important point businesses must remember:

Having a C/O does not guarantee a tax reduction.

To enjoy tariff preferences, businesses must check:

HS Code + Actual Origin + Rules of Origin + Type of C/O + Applicable Agreement.

4. Common Types of C/O in Import-Export

Depending on the trade lane and applicable agreement, businesses may encounter various types of C/O.

Some common types include:

Type of C/O	Related Market or Agreement
Form D	Trade in goods within ASEAN
Form E	ASEAN – China
Form AK	ASEAN – South Korea
Form AJ	ASEAN – Japan
Form VJ	Vietnam – Japan
Form AI	ASEAN – India
Form AANZ	ASEAN – Australia – New Zealand
Form VK	Vietnam – South Korea
EUR.1	Certain trade mechanisms between Vietnam and Europe
C/O CPTPP	CPTPP Agreement
C/O RCEP	RCEP Agreement
Form B	Non-preferential C/O

Example

A business imports machinery from China into Vietnam.

Instead of simply asking:

"Is there a Form E C/O?"

The business should check:

• Whether the goods genuinely originate from China;

• What the HS code of the product is;

• Whether the goods meet the rules of origin under the relevant agreement;

• Whether preferential tax rates apply to that HS code;

• Which origin document is most appropriate.

This approach helps businesses avoid situations where they have a C/O but still fail to receive the expected tax rates.

5. Does Every Shipment Require a C/O?

Not every shipment requires a C/O in the same way.

Whether a C/O or origin document is needed depends on:

• Type of goods;

• Exporting country;

• Importing country;

• HS code;

• Goods management policies;

• Objective of claiming tax preferences;

• Applicable trade agreements;

• Regulations of each market.

Besides traditional C/Os, some agreements allow alternative methods such as self-certification of origin or origin declarations under specific conditions.

Therefore, businesses should understand that:

A C/O is a form of origin document, but it is not always the only form.

6. How to Determine the Correct Type of C/O?

This is one of the most critical parts of handling goods origin.

Do not choose a C/O type based solely on the exporting country.

Businesses should check at least the following 5 factors:

6.1. Exporting Country

Which country are the goods exported from?

6.2. Importing Country

Which country will the goods be imported into?

6.3. HS Code of the Product

The HS code helps determine:

• Import tariff rates;

• Whether the product falls within the scope of preferences;

• Applicable rules of origin;

• Relevant regulatory requirements.

6.4. Rules of Origin

Depending on the product and agreement, goods may need to meet one or more criteria such as:

• Wholly obtained or produced;

• Regional Value Content (RVC);

• Change in Tariff Classification (CTC);

• Specific manufacturing or processing operations;

• Product-specific rules.

6.5. Applicable Trade Agreement

A trade route may fall under the scope of multiple different agreements.

Therefore, businesses should evaluate:

Which agreement applies -> Do the goods meet the rules of origin? -> Which tariff rate is more favorable? -> What type of origin document is required?

7. How to Read and Check a Certificate of Origin

When receiving a C/O from a supplier, businesses should not merely check whether the document has a stamp or signature.

The C/O must be cross-checked against the entire set of shipment documents.

Key information to check includes:

• Exporter: Check the name, address, and details of the exporting enterprise.

• Importer/Consignee: Information must match related documents.

• Means of Transport: Check details regarding the transport mode and route.

• Description of Goods: The description on the C/O should be consistent with:

  • Commercial invoice;

  • Packing list;

  • Bill of lading;

  • Customs declaration.

• HS Code: Check the HS code declared on the C/O against the requirements of the agreement or document template.

• Origin Criterion: This shows the criterion by which the goods meet the rules of origin.

• Quantity/Gross Weight: Check to avoid major discrepancies between the C/O and other documents.

• Invoice Number and Date: The invoice number and issue date must be cross-checked with the commercial invoice.

• Certification/Declaration: This section shows the certification or declaration of origin under the applicable mechanism.

Important Checking Principle

Businesses should cross-check information among:

C/O + Commercial Invoice + Packing List + Bill of Lading + Customs Declaration.

The more consistent the information, the lower the risk of having to provide explanations or supplementary documents.

8. Dossier and Procedure for C/O Application

The procedure for applying for a C/O may vary depending on the C/O type, agreement, and goods.

However, businesses can follow these basic steps:

• Step 1: Determine the required C/O type

  First, identify the export market, trade agreement, HS code, rules of origin, and suitable C/O type.

• Step 2: Prepare business profile

  First-time applicants may need to register merchant profiles in accordance with current regulations.

• Step 3: Prepare shipment dossier

  Depending on the case, the dossier may include:

  • C/O application form;

  • Commercial invoice;

  • Bill of lading;

  • Export customs declaration;

  • Packing list;

  • Product documentation;

  • Origin-proving documents;

  • Raw material information;

  • Production process;

  • Other documents as required.

  • Do not apply a fixed dossier set for all C/O types.

• Step 4: Declare and submit dossier

  Many C/O application procedures in Vietnam are now conducted electronically via origin management systems.

• Step 5: Review by competent authorities

  Upon receipt, the dossier may be:

  • Accepted;

  • Requested for supplementation;

  • Subject to further inspection;

  • Rejected if conditions are not met.

• Step 6: Receive the C/O

  If requirements are met, the business will be issued the origin document according to the applicable format.

9. Common C/O Mistakes

A issued C/O does not mean the importer can use it immediately without verification.

Below are some common errors:

• Incorrect exporter or importer information: Information on the C/O does not match commercial shipping documents.

• Incorrect invoice number or date: Invoice numbers or issue dates are inconsistent with commercial invoices.

• Inconsistent goods description: Descriptions on the C/O differ significantly from the invoice, bill of lading, packing list, or customs declaration.

• Incorrect HS code: The HS code directly affects the rules of origin and applicable tax rates.

• Incorrect origin criteria: This is one of the most crucial errors because the C/O is used to prove that goods meet origin conditions.

• Incorrect shipping information: Businesses must pay special attention if shipments involve transit, transshipment, third-party invoicing, back-to-back C/Os, or multiple enterprises in a single transaction.

• Using the wrong C/O type: If a shipment has a C/O but uses the wrong template or incorrect agreement, the importer may not receive the expected tax preferences.

10. How Does a C/O Affect Import Tariffs?

This is one of the most significant benefits of a C/O.

For example, a product has:

• Normal import tariff: A%

• Preferential import tariff if meeting a trade agreement: B%

If rate B is lower than rate A, the business can significantly reduce import tariffs.

However, to apply preferential rates, businesses must simultaneously check:

• HS codes;

• Actual origin;

• Rules of origin;

• Applicable agreements;

• Origin documents;

• Transportation conditions;

• Customs dossiers.

Therefore, do not just ask:

"Does this shipment have Form E?"

Instead, ask:

"With this HS code, this origin, and this transport route, do the goods qualify for preferential tariffs under the appropriate agreement?"

This approach helps businesses mitigate risks regarding tariffs and customs clearance.

11. An Easy-to-Understand Example of Form E C/O

Suppose a Vietnamese business imports machinery from China.

The supplier states that they can provide a Form E C/O.

The business should not immediately conclude that the shipment will receive a tax reduction.

They need to check:

• Step 1: Determine the machinery's HS code. The HS code determines the tariff schedule and relevant rules of origin.

• Step 2: Check if the goods originate from China. If the machine uses components from multiple countries, check whether it meets the rules of origin.

• Step 3: Check preferential tax rates. Determine the tariff rate under the ASEAN-China agreement for the specific HS code.

• Step 4: Check Form E. Review the exporter, importer, invoice, HS code, goods description, origin criteria, and transport route.

• Step 5: Cross-check with customs records. Information on the C/O must match the import document set.

If all conditions are met, the importer has the grounds to apply the corresponding tariff preferences.

12. How VICO Logistics Supports Businesses

In reality, a C/O does not exist in isolation; it relates directly to multiple documents and steps throughout the import-export process.

It can be visualized as a chain:

HS Code -> Commercial Invoice -> Packing List -> Bill of Lading -> C/O -> Customs Declaration -> Import Duty -> Customs Clearance.

If any piece of information is inconsistent, the customs clearance process may trigger requests for inspection or adjustment.

VICO Logistics supports businesses with related logistics activities, including:

• Pre-shipment consulting;

• Document coordination;

• International freight forwarding;

• Customs clearance support;

• Inland trucking;

• Warehousing;

• Last-mile delivery.

Regarding origin and tariff preference issues, businesses should prepare comprehensive information:

• Goods details;

• HS codes;

• Country of origin;

• Suppliers;

• Transport routes;

• Importing countries.

The more complete the information, the more accurate the logistics and document evaluation will be.

13. Frequently Asked Questions About Certificate of Origin

1. What does C/O stand for?

C/O stands for Certificate of Origin, meaning Giấy chứng nhận xuất xứ hàng hóa.

2. Are C/O and C/Q the same?

No.

C/O – Certificate of Origin: Certificate of Origin of goods.

C/Q – Certificate of Quality: Certificate of Quality.

These two documents serve completely different purposes.

3. Does having a C/O guarantee a tax reduction?

No.

Goods must meet the rules of origin and conditions of the applicable trade agreement. The origin document must also be valid.

4. What is Form E C/O?

Form E is an origin document commonly used in goods trade between ASEAN and China under the respective agreement. Businesses still need to check HS codes, actual origin, rules of origin, applicable tax rates, and document validity.

5. What is Form D C/O?

Form D is an origin document used for goods trade within the ASEAN region under the corresponding preferential mechanism.

6. Where to apply for a C/O?

Issuance depends on the type of document and competent authorities under current regulations. Many procedures are now carried out via electronic origin management and certification systems.

7. Is a C/O always a paper document?

No.

Depending on the agreement and mechanism, origin documents can exist in various formats, including electronic or self-certification in certain cases.

8. Can goods clear customs if the C/O has errors?

This depends on the nature of the error, the shipment, and customs requirements. Some errors may require explanations or supplementary documents. If the C/O fails to meet eligibility for preferences, businesses may not receive expected preferential rates.

Conclusion

A Certificate of Origin (C/O) is not merely a document indicating where goods are manufactured.

In import-export, a C/O directly impacts:

Goods Origin -> Import Tariffs -> Import Costs -> Customs Clearance -> Overall Shipment Efficiency.

Therefore, businesses should not only ask:

"Is there a C/O yet?"

They need to check deeper:

"Is it the right type of C/O? Do the goods truly meet the rules of origin? And does this document qualify for preferential tariffs?"

Before goods are shipped, businesses should proactively check:

HS Code + Origin + Rules of Origin + Trade Agreement + Related Documents.

Early preparation helps limit risks arising during import and customs clearance.

VICO Logistics assists businesses in coordinating international transport, documentation, customs procedures, warehousing, and domestic transport, helping manage shipments seamlessly from origin to final delivery.

Are you preparing an import-export shipment and unsure which type of C/O to use? Contact VICO Logistics for support in checking shipment information and finding the right logistics solution.