COC papers: the manufacturer's document behind every EU vehicle

What the COC is — and the role it expressly does not take on

The COC is not an official document issued by an authority but a declaration by the manufacturer: for one individual vehicle, identified by its vehicle identification number (VIN), the manufacturer certifies that as built it conformed to an approved vehicle type. The legal basis is EU Regulation 2018/858, which replaced the earlier framework of Directive 2007/46/EC. Not every new car automatically receives an Übereinstimmungsbescheinigung (certificate of conformity), however — only every vehicle built on the basis of an EU whole-vehicle type-approval. Vehicles with an individual approval or a national small-series approval fall outside this system — more on that in the penultimate section. How a vehicle type comes to be approved Europe-wide in the first place is a subject of its own and is covered in the article on EU type-approval; here we are looking at the document itself.

COCs exist not only for passenger cars but also for light commercial vehicles, trailers, motorcycles and scooters — the structure is the same, the data fields differ by vehicle category. For multi-stage vehicles, the classic case being a motorhome with a body builder working on someone else's base vehicle, the COC of the final stage is the decisive one, because only that document describes the finished vehicle. The paper is handed over when you buy a new car, together with the rest of the documents; many manufacturers print it on security paper that is hard to forge. The regulation also provides for an electronic COC format, but in the everyday work of the registration offices (Zulassungsstellen) the printed copy still dominates.

Equally decisive is where the COC stops: it is not proof of ownership — none of the vehicle documents takes on that role, and even the Zulassungsbescheinigung Teil II (registration certificate part 2) merely evidences who is entitled to dispose of the vehicle. Nor is it a registration certificate or evidence of the current technical condition, because it describes only the condition as delivered from the factory. It has no expiry date, but how much it tells you drops as soon as someone has changed approval-relevant parts without having the modification entered in the papers: the sheet then describes a vehicle that no longer exists in that form.

How to read a COC and which field in the Fahrzeugschein it becomes

The COC follows a template whose entries are numbered identically in all member states. The header section carries the make, the type and — as separate sub-entries — the variant and version, plus the commercial description, the vehicle category and the vehicle identification number. Because this order is fixed, you will find the same entry in the same place on a Swedish and on a Portuguese copy, no matter which language the labels are printed in. German registration offices therefore usually manage without a translation; whether one is demanded in an individual case varies from office to office.

After that come the technical blocks: masses and dimensions, drivetrain and engine, environmental data, and finally tyres, brakes and bodywork. A large part of this information later migrates into the coded fields of the German Zulassungsbescheinigung Teil I (registration certificate part 1, commonly called the Fahrzeugschein) — if you want to know where a figure in the Fahrzeugschein comes from, you will find it again in the COC. The mapping follows the harmonised European field codes and normally looks like this:

Two things deserve a particularly close look on a used car. First, the combination of type, variant and version: it describes the exact specification within a model range and determines which power output, which gearbox and which emissions stage are recorded for your particular car — on models that ran with many engine options, this is the most reliable way to check a listing against the factory data. Second, the entries that exist only in the COC and do not appear in the Fahrzeugschein at all: individual exhaust and noise measurements, for example, or the complete list of permitted wheel and tyre combinations. It is precisely for these cases that the document remains relevant after registration.

What you need the COC for beyond first registration

The best-known use case is the first registration of an imported vehicle: with a valid COC, the registration office takes over the technical data and an individual inspection is generally not required. Which further documents the authority wants to see and how the appointment runs is covered in the article on registration with a COC.

The second case is the journey back across the border. If you sell a vehicle registered in Germany to a buyer in Austria, France or Poland, their registration authority requires the same certificate — which is why dealers with an export business ask for it specifically when buying, and value vehicles without a COC more cautiously. When a new car is re-imported, the paper additionally serves as evidence that this is an EU specification and not a vehicle built for another market.

The third area of use is technical evidence during ongoing ownership. If you want to retrofit a towbar, the towable mass and noseweight documented in the COC determine what is permissible. If an imported car is fitted with a wheel and tyre combination that is not listed in the COC, you need an entry in the papers or a parts certificate — otherwise the discussion arrives at the next Hauptuntersuchung (the German periodic roadworthiness test) at the latest. And if the emissions class or the CO2 figure entered in the Fahrzeugschein does not match what the vehicle tax (Kfz-Steuer) or a low-emission zone (Umweltzone) would suggest, the COC is the basis on which you can ask the registration office to review it; the correction itself is made by the authority or a testing organisation, not by you with the paper in your hand.

Who issues the COC, what you submit and how long it takes

Only the vehicle manufacturer may issue it. Whether the request goes centrally to the manufacturer or runs through the national sales company of the country where the vehicle was originally delivered differs from group to group — for a vehicle delivered in Spain, the Spanish sales company is often the right address, even if the car has long since been in Germany. In practice the route runs either through a brand customer-service form or through a franchised dealer who submits the order for you.

What is almost always required is the vehicle identification number and evidence that you are entitled to make the request, usually a copy of the registration certificate or the purchase contract. Dispatch is normally only to the registered keeper or owner. That has a practical consequence many buyers overlook: as long as the vehicle is not yours, you cannot order the paper yourself — only the seller can. What you receive is strictly speaking a replacement copy, which some manufacturers mark as a duplicate; for registration purposes that is not a problem.

The fees range, depending on the manufacturer, from a double-digit to a low three-digit euro amount, and processing takes anywhere from a few days for current models to several weeks if archive data for older model years has to be looked up. For vehicles that are already two decades old, ordering a replacement can fail altogether: not every manufacturer keeps the data indefinitely, and for vehicles without an EU whole-vehicle type-approval there is simply no COC that could be reprinted.

Alongside this, service providers and portals advertise that they can obtain COC papers faster. Reputable providers submit the order to the manufacturer and charge a mark-up for it — technically they cannot do more than that. Be careful with offers that demand payment in advance without a verifiable company address, or that promise a COC for a vehicle for which one objectively cannot exist; in case of doubt the promise matches no data at all on the manufacturer's side, and your money is gone before the rejection arrives.

When a COC was never issued for a vehicle

Three groups have none by design. The first are vehicles from the era before EU-wide whole-vehicle type-approval: for a youngtimer or classic car from elsewhere in Europe, a certificate of conformity was as a rule never issued at all. The second are vehicles built for a non-EU market — the US import is the classic case; they meet the rules of their home market and therefore cannot have an EU COC. The third are vehicles with an individual approval or a national small-series approval, such as individually built special-purpose vehicles. For EU small-series type-approvals with a unit limit, by contrast, a certificate of conformity certainly is issued — so "small series" alone does not automatically mean "no COC".

The alternative route in all three cases is the individual inspection: an officially recognised expert from a Technische Prüfstelle (technical testing centre) or a test engineer from an officially recognised monitoring organisation — in everyday life you will encounter the names TÜV, DEKRA, GTÜ and KÜS — examines the specific vehicle and produces a report under § 21 StVZO, on the basis of which the registration office grants the operating permit. The effort involved can often be reduced if the manufacturer issues not a COC but a Datenbestätigung (data confirmation): a data sheet with the factory technical figures for the VIN, so the inspector does not have to determine every value on the vehicle from scratch. For older models that is often the more realistic request to put to the manufacturer than the COC itself — and it is usually cheaper.

How far the effort goes depends on the vehicle. A European classic in standard condition is usually straightforward. A vehicle from North America, on the other hand, needs conversions first depending on the model before it can even be inspected: a rear fog light, a different indicator specification — red indicators are common in the US and are not permitted here — headlights with the correct beam pattern, plus, depending on the vehicle, evidence on exhaust and noise behaviour. These costs arise after the purchase and do not show up in the asking price, so they belong in your calculation before you commit.

Before you commit: settle the COC question and have the vehicle inspected with it

Three points belong before the commitment: is the original COC available? If not — can it still be obtained from the manufacturer for this model year and this type at all, and who clarifies that? And who bears the fee and the waiting time? Put the answers in writing, because once the vehicle has been handed over you have no leverage left, and a seller who only dodges the COC question should show you evidence of the replacement order before you pay a deposit. This text is general information and does not replace legal advice; if you are unsure how to word such an agreement in the purchase contract, have a lawyer clarify it.

The second point concerns the vehicle itself. An available COC is of little use if the car deviates from the factory data: retrofitted wheels outside the listed combinations, a suspension change or a power upgrade without an entry in the papers, a towbar that appears in no document, a body conversion that affects the permissible masses. On imported vehicles this is harder to spot than on German cars, because the history is barely traceable — and listings say nothing about it.

That is why it pays to have the documents and the technology checked together in one appointment, before deposits and transport costs start flowing. checkdenwagen is an independent used-car inspection service: the inspector comes directly to the seller anywhere in Germany, and you do not have to be present. On-site, they record which documents are actually there and, in the technical check covering over 100 inspection points, also document modifications and deviations from standard specification that could become an issue at the registration appointment. The appointment takes approx. 1.5 hours on-site, and you get the report within 24 hours. The Standard Check costs from EUR 289 incl. VAT and travel, the Premium Check from EUR 339 incl. VAT and travel and adds a market-value assessment. The service has 4.9 stars from around 39 Google reviews. We provide buying advice — we are not damage assessors and we do not give legal advice.