7 Reasons Your Car Registration Was Rejected — And How to Fix Them

You’ve done everything right. You shipped the car, paid the import duties, booked the technical inspection — and then the registration authority sends your application back rejected. No plates. No registration certificate. Just a letter listing documents or conditions you didn’t know were required.

It’s one of the most frustrating experiences in the vehicle import process, and it happens far more often than it should. The good news is that most rejections are fixable. The bad news is that each day your car sits unregistered costs you time, money, and patience.

Here are the seven most common reasons vehicle registration applications get rejected across EU member states — and exactly what to do to resolve each one.

1. Missing Certificate of Conformity (COC)

This is the single most common reason for registration rejection across the EU, and it catches thousands of vehicle owners off guard every year.

The Certificate of Conformity is an official document issued by the vehicle’s manufacturer, certifying that your specific car was built in compliance with EU type-approval standards. Without it, registration authorities cannot verify the vehicle’s technical specifications, emissions classification, or legal compliance — and they won’t process the application.

Many buyers discover the COC is missing only when they arrive at the registration office. It may have been lost by a previous owner, never issued with a grey import, separated from the vehicle during a dealer transaction, or simply forgotten by everyone involved in the sale.

How to fix it: Obtain a replacement COC as quickly as possible. Contacting the manufacturer directly can take weeks, and results are not guaranteed for older models. The fastest route is through a specialist retrieval service — coc-auto.euallows you to request your official Certificate of Conformity online using your VIN, with delivery handled digitally so you can resubmit your registration application without unnecessary delays.

2. Incorrect or Incomplete Customs Clearance Documentation

For vehicles imported from outside the EU — including the UK post-Brexit — registration authorities require proof that the vehicle has been legally cleared through customs and that all applicable duties and import VAT have been paid.

The key document is the Single Administrative Document (SAD), known as the DUA in Spain or the DAU in other member states. If this document is missing, incomplete, or contains errors — such as an incorrect VIN, an inaccurate declared value, or missing customs office stamps — the registration will be rejected.

3. Failed or Missing Technical Inspection (ITV/TÜV/CT)

Every EU member state requires imported vehicles to pass a national roadworthiness inspection before registration. In Spain this is the ITV, in Germany the TÜV or DEKRA inspection, in France the Contrôle Technique, and so on. If the vehicle has not been inspected, or if it failed the inspection, the registration application will be rejected.

Common reasons for failing the inspection include:

• Worn brakes or tyres below the legal minimum tread depth
• Non-compliant lighting (particularly relevant for right-hand drive UK vehicles in continental Europe, where beam deflection or headlight replacement may be required)
• Emissions levels exceeding permitted thresholds
• Structural issues identified during the visual inspection
• Modifications that deviate from the original manufacturer specifications

4. Discrepancy Between the COC and the Vehicle

Even when a COC is present, registration can be rejected if the details on the document don’t match the physical vehicle or other documentation. Common discrepancies include:

• VIN on the COC not matching the VIN plate on the vehicle
• Engine specification on the COC not matching the declared engine
• Colour code mismatch (less common but occasionally flagged)
• COC issued for a different market variant of the same model

This can happen when the wrong COC was retrieved, when a vehicle has undergone undisclosed modifications, or when a previous owner substituted documentation from a similar model.

5. Proof of Ownership Issues

Registration authorities need to be satisfied that the applicant is the legal owner of the vehicle. Ownership disputes, incomplete title transfers, or documentation that doesn’t clearly trace the chain of ownership from the original registration to the current owner can all result in rejection.

Common problems include:

• A bill of sale that doesn’t match the name on the original title
• A title document from the country of origin that hasn’t been properly translated or apostilled
• Missing documentation for intermediate sales (for example, a vehicle that changed hands twice before reaching the current owner, with only the first and last transaction documented)
• Outstanding finance or a lien recorded against the vehicle in the country of origin

6. Unpaid or Incorrectly Calculated Registration Tax

Most EU member states impose a vehicle registration tax in addition to customs duty and import VAT. In Spain, this is the Impuesto Especial sobre Determinados Medios de Transporte, calculated based on CO₂ emissions. In other countries, the tax may be based on engine displacement, vehicle age, or declared value.

If the tax has not been paid, has been calculated on incorrect figures, or if the supporting documentation (such as the emissions data from the COC) doesn’t align with the tax declaration, the registration will be rejected or suspended pending payment.

7. Application Submitted to the Wrong Authority or Office

This one sounds trivial, but it causes genuine delays — particularly for expats unfamiliar with the administrative structure of their new country. Vehicle registration in the EU is handled at different administrative levels depending on the member state:

• In Spain, applications go to the provincial DGT office corresponding to the applicant’s registered address
• In Germany, the Zulassungsstelle is organised at the district (Kreis) level
• In France, the Système d’Immatriculation des Véhicules (SIV) process is largely centralised online, but errors in the online system can still result in rejection
• In Italy, registration is handled through the Motorizzazione Civile and the local ACI (Automobile Club d’Italia) office

Submitting to the wrong office, using an outdated form, or failing to follow the correct procedure for your specific residency status can result in an application being returned without being processed.

The Bottom Line

A rejected registration application is not the end of the road. Every one of the issues listed above is resolvable — some within days, others requiring a few weeks of follow-up. The key is identifying the exact reason for rejection from the authority’s written decision, addressing that specific issue methodically, and resubmitting a complete and accurate application.

Get the documentation right, and the rest of the process follows.