
After the sale of a vehicle, the former owner remains legally linked to the registration certificate until the change of ownership is effective in the national vehicle registration file (SIV). Fines, insurance reminders, liability in case of an accident: the consequences of a non-transferred registration certificate fall on the seller. The problem is that the system does not allow the former owner to easily verify whether the buyer has completed their process.
Transfer declaration: the only real protection for the seller
Before even trying to find out if the buyer has changed the registration certificate, the first question to ask concerns the transfer declaration registered on the ANTS. This formality, which is the seller’s responsibility, must be completed within fifteen days after the sale. Only this makes the administrative responsibility shift to the new owner.
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As long as this declaration is not made, the seller remains the official holder of the registration certificate. Professionals in the sale of used vehicles note that the majority of disputes related to fines received after the sale stem from a failure to declare the transfer by the seller, rather than a delay on the buyer’s part. In other words, the seller often has more control over the situation than they think.
During the online declaration on the ANTS website, a file number and a transfer code are generated. Several practical guides recommend providing a copy of this declaration (scan or photo) to the buyer, as this number then allows proof that the sale has been properly recorded, even if the buyer is slow to find out if the new owner has completed the registration becomes secondary in light of this proof of transfer.
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Check the change of registration certificate: what the seller can and cannot do
The natural reflex of the seller would be to contact the ANTS or the prefecture to ask if the vehicle is still in their name. In practice, this approach hits an administrative wall.
No access to the SIV for the former owner
The vehicle registration system (SIV) managed by the ANTS only provides information to the declared holder or certain administrations. A former owner has no online or telephone access to verify the status of the file. This lockout also applies at the counter: since the complete dematerialization of procedures, several prefectures and sub-prefectures no longer provide any information about the status of a registration file to a former holder.
Indirect signs that can alert
Without direct access to the SIV, there are still a few signals to watch for:
- Receiving a notice of contravention for the sold vehicle is the most common signal. If a fine arrives in your name after the transfer date, the change of registration has probably not been made.
- A reminder letter from the insurance company or a vehicle tax call for the sold vehicle indicates that the transfer of ownership is not recorded in the administrative files.
- The absence of notification from the ANTS confirming the deregistration of the vehicle from your name can also be an indication, although this letter is not systematic.
None of these signs constitute formal verification. They are alerts that trigger action, not confirmation.
Fine received after the sale: the contestation procedure
Receiving a fine for a sold vehicle is the most frequent situation, and the only one that really prompts a seller to act. The good news: the transfer declaration registered on the ANTS is usually sufficient to have the fine canceled.
The contestation is done via the ANTAI website (National Agency for Automated Processing of Offenses). A copy of the transfer certificate must be attached and the ANTS file number indicated. The processing takes several weeks, but the seller is not liable for the fine as long as the transfer is proven.
If the transfer declaration was never made, the situation becomes complicated. The seller must then regularize the transfer on the ANTS before they can contest. Since the fifteen-day period has passed, administrative complications may arise, especially if the buyer is no longer reachable.
Precautions to take on the day of the sale to avoid the problem
The best way to never have to question the buyer about the change of registration certificate is to act in advance. A few reflexes on the day of the transaction significantly reduce risks.
- Make the transfer declaration on the ANTS immediately after signing the transfer certificate, not “in the next few days”.
- Keep a copy of the transfer certificate (both Cerfa copies), the ANTS file number, and the transfer code.
- Photograph or scan the buyer’s identity card and driver’s license, with their consent.
- Cross out the registration certificate with the mention “sold on” followed by the date and time, then sign. This crossed-out document is given to the buyer, who will need it for their own registration certificate request.

The seller who has properly declared the transfer and kept their supporting documents has a solid case. The change of ownership then falls solely on the responsibility of the buyer, who has one month to submit their request for a new registration certificate.
In case of persistent doubt, directly contacting the buyer remains the simplest approach. The administration, on the other hand, will not answer this question.