What is the registration certificate – and where does it come from?
The modern registration certificate system is based on European harmonisation. With Directive 1999/37/EC, the European Union required Member States to standardise vehicle registration documents and make them more consistent across borders. Since then, many European registration systems have followed the principle of two functionally separate documents: Part 1 for everyday road use and Part 2 as a key ownership-related document.
The decisive difference compared with older vehicle documents is the clearer separation of functions. Losing the main ownership document used to create significant administrative difficulties. The current separation helps protect owners, makes vehicle fraud more difficult, and simplifies procedures when selling, financing, or re-registering a vehicle. The registration certificate is issued by the competent vehicle registration authority in the country where the vehicle is registered.
Important for owners of older vehicles: if a vehicle was registered before the current certificate system was introduced in the relevant country, older documents may still remain valid until the vehicle is newly registered, transferred, or re-registered.
Registration Certificate Part 1: the vehicle registration document
Part 1 is the document that drivers are usually required to carry in the vehicle. It contains the most important vehicle data in a compact format and is used as proof that the vehicle is registered for road use.
During traffic checks, police or control authorities may request this document. If the driver cannot present Part 1, a fine may apply, and the vehicle may be temporarily restricted from use until the document is provided.
| Field | Content |
|---|---|
| A | Date of first registration |
| D.1 | Make |
| D.3 | Commercial designation |
| E | Vehicle Identification Number, VIN |
| F.1 | Technically permissible maximum mass |
| J | Vehicle category |
| P | Engine data, including displacement, power, and fuel type |
If lost, the vehicle may not be allowed to circulate until a replacement has been issued. To apply for a new document, the vehicle holder usually needs to appear before the competent vehicle registration authority with valid identification and all available vehicle data. Administrative fees vary depending on the country, municipality, and procedure.
New digital vehicle registration optionsIn several European countries, vehicle registration procedures are increasingly becoming digital. Depending on the national system, vehicle holders may be able to store or access certain registration data through official digital services or apps. The physical registration document often remains valid and may still be required, especially for cross-border travel. For trips abroad, drivers should continue to carry the paper version of the registration certificate unless the destination country clearly accepts the digital format. |
Registration Certificate Part 2: the ownership-related vehicle document
Part 2 is the counterpart to Part 1 and is usually the more legally sensitive of the two documents. It serves as an ownership-related document and contains details about the vehicle holder and, depending on the national system, previous registered holders. It is normally issued in a larger format and includes security features.
The most important rule is simple: Part 2 should never be kept in the vehicle. Leaving it in the glove compartment can make it easier for a thief not only to drive away with the vehicle but also to attempt to resell it. For financed or leased vehicles, this question is often irrelevant: the bank, credit institution, or leasing company usually keeps Part 2 as security until the contract has been fully paid.
Key fields usually include: VIN, holder details, vehicle characteristics, colour, and information about previous holders where applicable.
When is Part 2 needed?
- When selling the vehicle – no serious buyer should accept a used car without Part 2.
- For financing or leasing – it may remain with the bank until the loan is fully repaid.
- When re-registering the vehicle in another registration area.
- When deregistering the vehicle.
- When registering an imported vehicle for the first time.
If Part 2 is lost, the process is usually much more complex than replacing Part 1. A formal declaration may be required, and depending on the vehicle registration authority, the procedure can take several weeks. That alone is a good reason to store Part 2 permanently in a safe place, such as a home safe or locked document cabinet.
The difference between Part 1 and Part 2 at a glance
| Feature | Registration Certificate Part 1 | Registration Certificate Part 2 |
|---|---|---|
| Former equivalent | Vehicle registration document | Vehicle ownership document |
| Format | Compact document | Larger security document |
| Function | Proof of registration | Ownership-related proof |
| Storage | Usually kept in the vehicle | At home or with the bank |
| Must be carried while driving | Yes, in most cases | No |
| When needed | Everyday driving | Sale, financing, re-registration |
| If lost | Replacement usually simpler | Formal declaration often required |
What is the COC document – and how does it differ from the registration certificate?
Anyone importing a vehicle from another EU country will usually hear the term COC during the registration process. The COC, or Certificate of Conformity, is also known as the European Certificate of Conformity. It sounds technical — and it is. It is not issued by a registration authority, but directly by the vehicle manufacturer. Its legal basis is Regulation (EU) 2018/858, which has applied since 2020 and replaced the previous framework Directive 2007/46/EC.
What exactly does it contain, and why is the registration certificate not enough? Registration Certificate Part 1 and Part 2 document the administrative side of the vehicle: who holds it, where it is registered, and when it first entered road traffic. The COC confirms the technical conformity of the specific vehicle with its approved type.
This includes, among other details: emissions values, CO₂ data, nitrogen oxide values, Euro standard, axle loads, total weight, vehicle dimensions, length, width, height, wheelbase, noise levels in dB(A), tyre specifications, rim sizes, and the EC type-approval number. In short: the registration certificate says who the vehicle is registered to. The COC says what the vehicle technically is.
This level of detail makes the COC the document that the competent vehicle registration authority needs in order to issue registration documents for a vehicle that has not previously been registered in that country. It is valid across the European Union and is designed for cross-border recognition. If a vehicle is purchased in one EU Member State and registered in another, the same COC can usually be used without translation or additional certification.
Learn more: What is the COC paper?
Registration Certificate Part 1 / Registration Certificate Part 2 / COC compared
| Feature | Registration Certificate Part 1 | Registration Certificate Part 2 | COC |
|---|---|---|---|
| Issued by | Vehicle registration authority | Vehicle registration authority | Vehicle manufacturer |
| Function | Proof of registration | Ownership-related proof | Technical conformity |
| Valid in | National registration system | National registration system | Entire EU |
| Must be carried while driving | Yes, in most cases | No | No |
| Typical use | Daily driving | Sale, financing | Import, first registration |
When do I need which document?
The question of which document is needed in which situation is a constant source of uncertainty for many vehicle owners, especially when a vehicle is moved across borders or purchased from another EU country. The good news is that the logic can be reduced to a few clear cases.
For everyday driving, Registration Certificate Part 1 is the relevant document. It should be carried in the vehicle, while the other documents should remain safely stored.
When selling a vehicle within the same country, both parts usually change hands. Part 1 remains with the vehicle, while Part 2 helps confirm that the seller is the registered holder and can transfer the vehicle properly. Without Part 2, an experienced buyer should be cautious about purchasing a used car.
When importing a vehicle from another EU country — for example, after buying a car in Italy, Spain, France, the Netherlands, or another Member State — the COC is often the decisive basis for first registration. The foreign registration certificate from the country of origin is usually not sufficient as the only technical proof. The COC, however, is standardised across the EU and is widely accepted by registration authorities.
For the first registration of an imported vehicle with no prior national registration history, the COC is essential. On this basis, the vehicle registration authority can issue new national registration documents for the vehicle. Without a COC, the registration process may be delayed or refused.
- Everyday driving → Registration Certificate Part 1
- Vehicle sale within the same country → Part 1 + Part 2
- Import from an EU country → COC, often required for first registration
- New registration after import → Part 1 + Part 2 + COC
- Cross-border purchase or sale within the EU → COC
- First registration of an imported vehicle → COC + subsequent issue of national registration documents by the vehicle registration authority
- Vehicle financing or leasing → Part 2 may remain with the bank or leasing company
