IDU (Identifiant Unique)

Also known as: Identifiant Unique, unique identifier

Verified on 2026-09-01

The French EPR registration number from the ADEME register. You receive it via your éco-organisme (e.g. Citeo, Adelphe, Léko) and must store it with marketplaces, among others. A common mistake on Amazon: the éco-organisme's customer or contract number is entered instead of the IDU – the check then reports 'number invalid'.