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June 2, 2024

CoC Documents: The Key to EU-Wide Vehicle Registration

CoC Documents: The Key to EU-Wide Vehicle Registration

Registering a vehicle within the European Union can be significantly simplified with a Certificate of Conformity (CoC). This document, also known as a conformity certificate, is essential for the smooth import and export of vehicles, as well as their sale and registration across borders. In this article, we explore the importance of CoC documents, explain what information they contain, and why they are indispensable when purchasing a new or used vehicle within the EU.

1. Fundamentals of CoC Documents - What Are They Used For?

Definition and Purpose:

The Certificate of Conformity (CoC), also known as a conformity certificate, is a crucial document for vehicles within the European Union. Issued by the manufacturer, it certifies that the vehicle complies with the applicable EU norms. The primary goal of the CoC is to facilitate the registration of vehicles in any EU member state by ensuring they meet the required technical specifications and safety standards.

Contents of the CoC Documents:

A CoC document contains detailed information about the vehicle, much more than what is found in national registration certificates. This includes:

  • Vehicle Identification Number (VIN)
  • Manufacturer and type approval number
  • Technical Specifications: dimensions, engine data, weight categories, maximum payload, fuel type, and consumption.
  • Emission Values: information on CO₂ emissions and emission classes.
  • Permissible tire and wheel combinations

2. The Importance of CoC Documents When Buying a Vehicle

For New Vehicles:

When purchasing a new vehicle within the European Union, the Certificate of Conformity (CoC) is crucial. This document significantly eases the vehicle registration process and avoids lengthy bureaucratic procedures. Buyers should insist on receiving this document at the time of vehicle delivery to prevent future complications during registration.

For Used Vehicles:

Buying a used car comes with additional challenges, especially if the CoC document is not available. In such cases, registering the vehicle in another EU country can become more complicated, as compliance with EU norms is not easily verifiable. It's particularly important to check whether the CoC documents are available when purchasing. If they are missing, the new owner may attempt to reorder them from the manufacturer, which could incur additional costs.

Practical Tips:

  • Be mindful during the purchase: Ensure that the transfer of CoC documents is contractually agreed upon. This applies to both new and used vehicles.
  • Document verification: Check the CoC documents for completeness and accuracy of the information contained. Make sure that the Vehicle Identification Number (VIN) on the CoC matches that of the vehicle.
  • Requesting missing documents: If the CoC documents are missing, immediately contact the vehicle manufacturer or the relevant branch to request a copy. The costs can vary, so it's advisable to clarify this in advance.

3. CoC Documents in Practice

Applying for a CoC:

If a CoC document has been lost or was never provided with a used vehicle, it can usually be reordered from the manufacturer. This is often done through the official website or by directly contacting an authorized dealer. The cost of reissuing a CoC can vary, so it is wise to inquire about this in advance. Typically, manufacturers are required to provide these documents for vehicles that have been approved according to EU standards.

Registration Process With and Without a CoC:

A Certificate of Conformity (CoC) significantly facilitates the registration of a vehicle as it contains all the necessary technical specifications and proofs of conformity. Without a CoC, registering a vehicle in an EU country can be more complicated, especially if it is an imported vehicle. In such cases, an officially recognized expert may be required to confirm the vehicle's compliance with EU norms.

Tips for Handling CoC Documents:

  • Storage: Keep the CoC documents in a safe place, as they are crucial for the registration or resale of the vehicle.
  • Make a copy: It is advisable to make a copy of the CoC documents and keep it separate from the originals.
  • Inquire at purchase: When buying a vehicle, inquire about the presence of the CoC to avoid future issues.

Cardino’s Role: Cardino removes all unnecessary difficulties in buying and selling cars for both used car dealers and private sellers. We make a seamless process for EV owners to sell their cars and for dealers to buy them. By freeing the EV sellers from the complicated process of selling their EVs in a traditional marketplace way and providing a platform for dealers to broaden their inventory.


CoC documents are not just bureaucratic paperwork but a crucial element for smooth mobility within the European Union. They significantly simplify the registration process and protect both buyers and sellers from potential legal and administrative complications.


What exactly is a CoC document, and why is it needed?

The Certificate of Conformity (CoC), also known as a conformity certificate, is an official document issued by the vehicle manufacturer. It certifies that the vehicle complies with applicable EU norms.

Can I register a vehicle without CoC documents in the EU?

Registering a vehicle without CoC documents is possible but can cause significant difficulties and additional costs. Without a CoC, the vehicle's technical data must be verified through other documents or an expert assessment, making the process more complicated and time-consuming.

How and where can I reorder a lost CoC document?

A lost or missing CoC document can usually be reordered from the vehicle manufacturer or through an authorized dealer.

What typically appears in a CoC document?

A CoC document includes detailed information about the vehicle, such as the Vehicle Identification Number (VIN), manufacturer details, technical specifications (dimensions, weight, engine performance, emission values), and the type approval number.

Is it necessary to always carry the CoC document in the vehicle?I

t is not legally required to carry the CoC document in the vehicle at all times. However, it should be kept safe as it is needed for the registration of the vehicle in another EU country or when selling the vehicle.

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