Your company will need to register in each EU country where it has obligations. The following list shows all European WEEE Registers by country. There is no such thing as a Pan-European WEEE registration (see explanation provided by the European network of WEEE Registers). Local entities are allowed to register directly with the WEEE National Register whereas foreign entities must appoint an Authorized Representative in each country where they need to register as producers. In most countries (especially if you sell household products) you will also need to join a collective recycling organization. Those organizations provide several services.