Changing vehicles, declaring a transfer, or receiving a registration certificate: these automotive administrative procedures concern millions of drivers each year. Since the complete digitization of procedures, everything is done online. The time savings are real, but so are the blockages. Understanding the available tools, their limitations, and the alternatives can help avoid unnecessary weeks of waiting.
Common blockages on the ANTS website and how to bypass them
Have you ever initiated a gray card request on the ANTS website, only to see your file stuck for weeks without explanation? The problem rarely stems from a missing document.
Blockages can result from a discrepancy between the SIV (Vehicle Registration System) databases and the information entered by the user. An address slightly different from the one recorded, a previous owner who hasn’t declared the transfer on their side, or a technical inspection whose date hasn’t yet been updated in the system: these are all invisible causes for the user.
Before resubmitting a request, check three concrete points:
- The seller has correctly registered the transfer declaration on their ANTS account or via Simplimmat, and you have the associated transfer code.
- Your technical inspection is valid and less than six months old (for a vehicle over four years old).
- The address provided exactly matches that of your proof of residence, including typography (street, avenue, abbreviation).
If the file remains pending despite everything, it is possible to access the administrative space of Mon Conseiller Automobile to delegate the procedure to an authorized professional, which often speeds up the unblocking thanks to direct access to the SIV.
Simplimmat: what the app changes for transfer and registration
Simplimmat is the official application launched by ANTS to simplify two specific procedures: declaring the transfer of a vehicle and requesting a new registration certificate. It works on smartphones and partially replaces the classic website visit.
Its main advantage is the smoothness of the transfer declaration. The seller scans the registration certificate, enters the buyer’s information, and validates. The buyer then receives a transfer code that they use for their own registration request.
However, Simplimmat does not cover all situations. A change of ownership on an imported vehicle, a correction of an administrative error, or a complex file (inheritance, collector vehicle) still require going through the ANTS website or consulting an authorized professional.
Difference between Simplimmat and the ANTS website
Simplimmat is a simplified entry point, not a complete replacement. The ANTS website remains the reference platform for file tracking, duplicate requests, corrections, or special cases. Simplimmat handles ordinary transfers and registrations, nothing more.
Authorized professionals in the SIV: when and why to delegate
A majority of registration requests now go through authorized professionals, according to a response from the Ministry of the Interior published in the Senate in May 2026 and reported by TF1 Info. This figure nuances the idea that digitization makes intermediaries unnecessary.
An authorized professional has direct access to the SIV, allowing them to process a file in a few hours instead of several days. The difference is particularly noticeable in three cases:
- Purchase of a used vehicle with an incomplete file (old gray card crossed out but transfer not declared online).
- Change of address combined with a change of ownership, which sometimes generates two distinct requests on the ANTS website.
- Vehicle purchased in another region, with different regional taxes to calculate.
Strengthened authorization in 2026
Access for professionals to the SIV is subject to stricter regulation. New authorization conditions have been introduced, including active involvement in registration for at least three years and a minimum threshold of operations. For the user, this means that not all online providers are equal. Check that the chosen intermediary clearly displays their prefectural authorization number.
Cost of the gray card: recent changes to know
The price of the registration certificate depends on the vehicle’s fiscal power, the region of residence, and the type of engine. But a recent change deserves attention: electric vehicles no longer benefit everywhere from a regional exemption.
The reduction of these exemptions began in May 2025 and has varying effects depending on the regions in 2026. A driver purchasing a used electric vehicle may therefore be surprised at the time of the registration request, with a regional tax amount higher than expected.
To anticipate the actual cost, consult the tax simulator available on the ANTS website before finalizing your purchase. The amount displayed during the online request normally includes the updated rates for your region.
Documents to prepare for any request
Regardless of the channel chosen (ANTS, Simplimmat, authorized professional), the basic file remains the same: identity document, proof of residence less than six months old, old gray card crossed out and signed, Cerfa form for registration request, and if applicable, the technical inspection report. A complete file from the start reduces the risk of blockage by several weeks.
The digitization of automotive procedures has eliminated queues at the prefecture, but not administrative complexity. Choosing the right tool according to the situation (Simplimmat for a simple transfer, ANTS for a special case, authorized professional for a blocked file) remains the best way to obtain your registration certificate without excessive delay.
