No, marketplaces do not check in the same way everywhere. Each EU country has its own packaging register, with its own registration number and its own requirements for what you must submit. A marketplace operating in Germany will ask for a LUCID number; the same marketplace will ask in the Netherlands for registration with Verpact. If you sell through one platform to customers in multiple countries, it is therefore possible that you will need to provide something separately per country, even though it concerns exactly the same packaging.
These differences do not lie in the purpose of the rules — which is the same throughout the EU — but in how each Member State implements them. Each country has set up its own register, with its own name, its own registration procedure, and sometimes its own point in time when it became mandatory. A marketplace builds its verification around those national registers, which explains why the question you receive in one country sounds different from the one in another.
Why marketplaces check differently per country
A marketplace is legally required to prevent unregistered packaging from being traded via the platform. Because the trading ban is enforced per country by the national supervisory authority, a marketplace directs its verification at what that specific country requires. For Germany, that means a valid LUCID number; for France, registration with the system designated there; for the Netherlands, registration with Verpact. A platform selling in ten countries thus maintains, in practice, ten different verification procedures, even though it appears to you as one and the same sales environment.
What a marketplace typically asks for
Most platforms ask for a registration number that you enter in your seller profile, and verify that number by sampling or automatically against the national register. Some countries give the marketplace direct access to the register, which makes verification almost automatic; other countries do not yet offer that connection, causing a marketplace to ask for supporting documentation that you yourself supply. This difference is not due to the marketplace but to how far that country's register is technically set up. Which procedure applies to which country also changes regularly, because registers are updated and linked.
Selling in multiple countries? Then each country counts separately
It is a misconception that registration in one EU country automatically counts in another country. Registration with Verpact covers the Dutch market; as soon as you also deliver to German or Belgian customers via the same marketplace, a separate registration is required there. For the marketplace itself, this is not visible as one process — the platform verifies per shipping country or destination country what is required at that moment. This makes it harder for a webshop operating in multiple countries to keep track of which register applies where, and which supporting document a marketplace may request at which time.
What this practically means for your webshop
For a webshop selling only in the Netherlands, this remains straightforward: one register, one number, one verification point. As soon as you use a marketplace to serve customers in other EU countries as well, a separate registration requirement applies per country, with its own supporting document that the marketplace can request. This is also why many entrepreneurs only realize something needs to be done when a marketplace blocks a listing or asks for additional information. Which register applies to which country and what is needed for it, the wizard sets out clearly for you per country and packaging type, showing your situation on a clear overview.
The guidelines of the individual Member States describe themselves which documents a marketplace may request and within what timeframe a registration must be in order; in case of doubt about a specific situation, the national competent authority or a lawyer is the appropriate place to have that assessed. What is in the knowledge base is intended to map the differences between countries, not to pass judgment on your specific situation.
Would you like to see for your own packaging and countries which register applies and exactly what is needed there? Do the free quick-scan via the role finder, or read in the knowledge base how the registration per country works. If you still have doubts about a part after reading, the frequently asked questions address the situations that come up most frequently.