What is a French Unique Identification Number (IDU)?

The Unique Identification Number, or Identifiant Unique (IDU), is a mandatory 15-character code issued to companies selling goods in France. Since 1 January 2022, sellers without a valid IDU risk French administrative fines of up to 30,000 EUR, and marketplaces must verify the code before allowing sales.

Selling products into the French market means engaging with one of the most developed Extended Producer Responsibility frameworks in Europe. As e-commerce has expanded, authorities have sought reliable ways to track which businesses are fulfilling their environmental obligations and funding the recycling of the waste they generate. The solution they introduced is a specific tracking code that acts as a compliance passport for merchants.

For online sellers, this number frequently becomes an urgent priority when a marketplace suddenly restricts a seller account or threatens to deduct environmental fees directly from payouts. Without this code, you are effectively invisible to the French regulatory system, making it impossible to prove that you are contributing to the national recycling infrastructure. Getting your code is the key to trading legally in France and avoiding marketplace penalties.

What the French IDU actually means

Under the French Anti-waste Law, also known as the AGEC law, the Identifiant Unique was created to identify every company registered with an approved producer responsibility organisation (L'Identifiant Unique de la REP des Emballages de la Restauration - Citeo). Generated exclusively by the French Agency for Ecological Transition (ADEME), this 15-character code is entirely specific to each waste stream (L'identifiant unique | Citeo).

If a seller places household packaging, printed paper, and textiles onto the French market, they will need a distinct tracking number for each of those three categories. You cannot use your packaging code to clear your electronics obligations. The code itself remains active for the entire duration of your contract with your chosen environmental scheme.

Since 1 January 2022, you must possess a unique identifier generated by the French Agency for Ecological Transition (ADEME) to prove your compliance with Extended Producer Responsibility regulations (Mon adhésion - Citeo.com).

Securing the code requires an active contract and payment of your environmental contributions. It exists to eliminate free-riding by ensuring that every merchant who profits from selling in France also pays for the collection, sorting, and recycling of the resulting waste.

Does this apply to me?

If you sell packaged products directly to French households, this requirement lands squarely on your desk. The rule captures producers, importers, and distributors who are the first to place packaged items onto the French market.

There is no minimum volume or sales threshold for this requirement (Adhérer à Citeo: REP emballages et papiers graphiques). The obligation applies from the very first unit of packaging or printed paper you introduce to the market. This means even small independent sellers must secure their code to trade compliantly.

Marketplaces face strict monitoring rules regarding these codes. Since 1 January 2022, platform operators have been legally required to keep an up-to-date register of the unique identifiers of their third-party sellers. If a marketplace seller does not possess their own code, the platform itself becomes legally responsible for declaring the packaging and paying the associated recycling contributions on the seller's behalf. To manage this liability, marketplaces routinely demand the code from their merchants or impose specific per-order penalty fees to cover the compliance costs.

What is the IDU's format, and what deadlines and penalties apply if you don't have one?

The compliance numbers that matter are the penalties and the deadlines, and the French Environmental Code is explicit on both: what missing documentation costs, and by when the IDU must be held.

Beyond the strict administrative fine of up to 30,000 EUR for failing to hold a valid code, sellers must publicly display this information. The law mandates that you display the code in your general terms and conditions of sale, on any contractual documents, and directly on your website.

Common misconceptions about the Identifiant Unique

“I only need one code for all my sales in France”

This is a frequent point of confusion. The code is scheme-specific, meaning you receive a separate code for each waste category you place on the market. A seller dealing in clothing packaged in cardboard will need one code for the textile stream and a completely different code for the packaging stream.

“I can generate the code myself through the ADEME website”

Sellers cannot simply log into the government portal and generate their own code. The number is automatically generated and issued to you only after you have successfully registered with an approved producer responsibility organisation and paid your membership fees. The scheme handles the administrative transfer with the government on your behalf.

“If I sell through a marketplace, they handle the code for me”

While marketplaces are obligated to collect recycling fees if you fail to provide a code, relying on them is often more expensive. Platforms often charge a premium or administrative fee per transaction to manage this on your behalf, and relying on the platform does not cover your direct website sales. Obtaining your own code is the most cost-effective path.

“My VAT number covers my compliance”

Tax registration and environmental compliance are entirely separate systems in France. Having a French VAT number or being registered for standard business taxes does not exempt you from Extended Producer Responsibility rules, nor does it replace the specific 15-character environmental tracking code.

5 examples of where to use your IDU

1. E-commerce website footers

Merchants commonly place their 15-character code in the footer of their online stores. This ensures the number is visible across all pages and easily verifiable by visiting regulatory authorities or consumers.

2. General terms and conditions

Including the number within your official terms of sale is a direct regulatory requirement. This formally records your compliance status in the legal agreement between you and the French consumer.

3. Marketplace seller profiles

Platforms feature dedicated compliance sections within the seller dashboard. You must input your code here so the platform can cross-reference it with the national database to clear your account for selling.

4. B2B sales contracts

When supplying goods to retailers or distributors in France, your commercial contracts should display the code. This assures your business partners that the environmental fees for the packaging have already been settled.

5. Customer invoices

Printing the code on your standard customer invoices provides immediate transparency. It demonstrates to buyers that the environmental impact of their purchase is being actively managed and funded.

Terms related to the IDU

Frequently asked questions

How long does it take to get my code?

Once you complete your registration and pay your contribution to a French producer responsibility organisation, the issuance is relatively fast. The scheme submits your details to the national registry, and you typically receive your 15-character code within several days of your contract becoming active.

Do I need a code if I sell less than 1,000 orders a year?

Yes, you absolutely do. The French environmental regulations do not include a minimum sales threshold or a low-volume exemption. You are legally required to hold a valid code from the very first unit of packaging or product you ship to a consumer in France.

How do marketplaces verify my code?

Marketplaces connect directly to the ADEME database or use specific search portals to validate seller codes. They check if the 15-character string matches your company details and verify that the code remains active for the current calendar year.

Can I use my German packaging number in France?

No, environmental registrations do not cross borders. The LUCID number you hold for the German market is completely invalid in France. You must register specifically with a French scheme to receive your French identifier.

What happens to my code if I change my compliance scheme?

Your identifier is tied to your business entity, but its active status is maintained by your scheme. If you cancel a contract with one organisation and move to another, the new organisation will notify the authorities, and your existing code will typically remain valid under the new contract.

Where do I find my code if I lost it?

If you have misplaced your code, you can log into the client portal of the producer responsibility organisation you registered with. Your code is always stored in your account details. Alternatively, the public ADEME directory allows you to search for your company name or tax identifier to retrieve your active codes.

Sources:

• L'Identifiant Unique de la REP des Emballages de la Restauration - Citeo
• L'identifiant unique | Citeo
• Mon adhésion - Citeo.com
• Adhérer à Citeo: REP emballages et papiers graphiques
• My membership - Citeo.com
• Accueil non connecté - ADEME SYDEREP