If you sold on Amazon.de over the past few years, you know the drill: a registration number becomes mandatory, Seller Central starts asking for it, and one day listings without a valid number go dark. That was Germany's LUCID. Amazon checks the number against the national register, and if it doesn't hold up, your products stop selling — no inspector, no court, no warning letter required.
France has written the same trigger into its own law, and the number at the centre of it is the IDU — the identifiant unique, issued through ADEME's SYDEREP system when you register with the eco-organisme of each product stream you touch. The legal duty for platforms to verify it already exists. This article explains what the law actually says, why the IDU is a harder check than LUCID ever was, and what to have in place before your marketplace asks.
What French law puts on the marketplace
Article L. 541-10-9 of the French Environmental Code makes marketplaces co-responsible for their third-party sellers' EPR compliance. Platforms like Amazon.fr, Cdiscount, ManoMano and Fnac must verify that every third-party seller holds a valid IDU for the relevant filières — France's product streams under extended producer responsibility (REP). And the law adds teeth: if the seller doesn't have one, the platform itself becomes the producer, with all the registration, declaration and fee obligations that entails.
Read that from the platform's side. A marketplace with hundreds of thousands of third-party sellers is not going to absorb producer liability for the ones who never registered. It has exactly one cheap way to make that risk go away: verify the number, and block the listing when the number isn't there.
The playbook you already know from LUCID
This is not speculation about how platforms behave — it is how they already behave. Amazon enforces German LUCID numbers by validating them against the national packaging register and suppressing listings when a number is missing, invalid or doesn't match the seller's details. That enforcement got more sellers registered than any fine ever did, because the incentive is symmetric: the platform protects itself from liability, and the seller loses revenue the moment the check fails.
France's Article L. 541-10-9 creates the same liability structure. We are not going to tell you a specific date when Amazon.fr will run its next verification sweep — nobody outside Amazon knows that, and anyone who claims to is guessing. What we can tell you is that the legal duty to verify exists now, the platform's exposure exists now, and the LUCID precedent shows exactly what platforms do with that combination. Waiting to see whether enforcement "really happens" means betting your French revenue on a marketplace choosing to carry your liability. That is not a bet platforms take.
Why the IDU is a harder check than LUCID
Here is where French verification bites harder than the German version: LUCID is one register for one obligation (packaging). The IDU is per filière — and France operates roughly 19 REP filières: packaging, electronics, batteries, textiles, furniture, toys, sports equipment, DIY and garden products, and more.
Each filière has its own eco-organisme, its own registration, and its own IDU issued in your name via SYDEREP. Sell a toy on Amazon.fr and you are not looking at one number: the toy itself falls under the JOUET filière (Ecomaison), its box and blister under household packaging (CITEO, Adelphe or Léko), and if it takes batteries, those are a third filière with its own registration. A seller who proudly enters their CITEO packaging IDU into Seller Central may still be missing two of the three numbers the law expects them to hold — and the €30,000 administrative penalty for a missing IDU applies per filière, not per company.
This is the single most common gap we see: sellers treat "French EPR" as one obligation because in Germany it effectively was. In France it is a list, and the list depends on what you sell. Our guide to the French filières walks through how to map a catalogue to the streams it touches.
The mandataire layer underneath
Getting the IDUs is no longer the whole job. Since 10 July 2026, law 2026-602 requires every producer not established in France to appoint a mandataire — a representative established in France, designated by written mandate, who takes over the producer's REP obligations. If you sell into France from Spain, Germany, the UK, the US or China without a French entity, this applies to you.
There is one nuance that matters specifically for marketplace sellers. The law deems the obligation satisfied where a person established in France already ensures compliance with your REP obligations — in practice, mainly where the marketplace itself takes on the obligations for your sales through it. That exception is real, but read its limits carefully:
- It covers, at most, the sales that go through a platform that actually assumes your obligations — not your existence as a producer in general.
- Your direct-channel sales — your own Shopify or WooCommerce store shipping to French customers — are not covered. For that revenue, the mandataire obligation is yours, in full.
- It does not repeal the verification duty. Marketplaces are still required to check that their sellers hold valid IDUs for the relevant filières.
A pure-marketplace seller and a marketplace-plus-webshop seller are therefore in genuinely different positions — and most SMBs selling on Amazon.fr are the second kind.
What non-compliance actually costs
On paper: administrative penalties of up to €30,000 per missing IDU, per filière. A seller touching three filières without registering is theoretically exposed to €90,000. But be honest about where the risk really sits. French inspectors are not the enforcement mechanism that reaches a Polish or American Amazon seller first — the platform is. The practical cost of a missing IDU is not a fine you might receive; it is a listing block that switches off your French revenue on the day the check runs, and stays off until the number exists and validates.
And the exposed population is enormous. Our analysis of ADEME's public producer register found that roughly 69% of producer registrations belong to companies not domiciled in France. The co-responsibility rule and the mandataire rule are both aimed squarely at cross-border e-commerce — which is to say, at marketplace sellers.
What to do now
- Inventory your filières. Go product by product, not "we sell packaged goods". What is the product? Does it contain electronics or batteries? Is it a toy, a textile, furniture, sports gear? Each yes is a filière, an eco-organisme and an IDU. Start with the filière map.
- Get the missing IDUs. Registration runs through the eco-organisme of each filière, and the IDU is issued in your name via SYDEREP. If you already hold a packaging IDU, that filière is covered — the others are not covered by association.
- Line up the mandataire. If you are not established in France and you have any direct-channel sales, you need one — and the market of providers is thinner and younger than search results suggest, so do the due diligence before you sign.
- Keep your numbers ready for verification. When a platform asks — through Seller Central, through a compliance email, through a listing flag — you want every registration number, its filière and its status in one place, ready to hand over the same day. Sellers who scramble through old emails for a number while their listings are suppressed lose weeks of revenue over an administrative lookup.
How Pack Declare helps
Pack Declare's compliance passport keeps your EPR registration numbers per country in one place — validated against the official formats where they exist, with renewal alerts, and with a shareable evidence page you can hand to a marketplace verification request in one click instead of a mailbox archaeology session. We also map which French filières your catalogue touches, so the gap list exists before a platform finds it for you. We are software, not a mandataire — for the representative itself you still need a provider established in France — but the inventory, the numbers and the evidence are the part you can fix this week.
Check your French (and EU-wide) obligations free →
Frequently asked questions
What is the French IDU?
The IDU (identifiant unique) is the unique identifier issued through ADEME's SYDEREP system when a producer registers for a French REP filière, via that filière's eco-organisme. It is issued per filière, not per company — a seller touching packaging, toys and batteries holds three IDUs, not one.
Do marketplaces have to verify my IDU?
Yes. Article L. 541-10-9 of the French Environmental Code makes marketplaces co-responsible: they must verify that every third-party seller holds a valid IDU for the relevant filières. If the seller does not, the platform itself becomes the producer — which is why platforms respond to this kind of liability by blocking listings, as Amazon already does with German LUCID numbers.
Is my packaging IDU from CITEO enough for Amazon.fr?
Only for the packaging filière. The IDU is per filière, and France operates roughly 19 of them. If your products are also toys, electronics, textiles or contain batteries, each of those streams needs its own registration and its own IDU. A single packaging number does not cover them.
Does selling only through a marketplace exempt me from the French mandataire rule?
Partially at most. Law 2026-602 (in force 10 July 2026) requires non-established producers to appoint a French mandataire, and deems the obligation satisfied where a person established in France — typically the marketplace, for sales through it — already ensures compliance. Direct-channel sales, such as your own webshop, are not covered by that exception.
What happens if I sell in France without an IDU?
Administrative penalties reach €30,000 per missing IDU, per filière. In practice the bigger risk is commercial: a marketplace that would otherwise become the producer for your sales blocks the listing, and your French revenue stops until the number exists and validates.
Related reading: The French EPR filières, mapped · Amazon sellers and EPR: why FBA data alone won't keep you compliant · EPR for marketplace sellers