Who files your EU customs declaration? (It can’t be you)

The declarant must be EU-established

The person in whose name the customs declaration is lodged — the declarant — must be established in the customs territory of the Union. A routine direct-to-consumer seller based outside the EU does not qualify, and the narrow exceptions do not reach them.

Source: UCC Art. 170(2); derogations in Art. 170(3) do not cover routine DTC.

Direct vs indirect representation — the difference that matters

Under direct representation an agent acts in your name, but you stay the declarant — useless if you are not EU-established. Under indirect representation the agent acts in their own name and becomes the declarant. That is the route that works for a non-EU seller — but it does not move the customs debt off you: the agent is a debtor, and you, as the person on whose behalf the declaration is made, are also a debtor for the same debt. That is joint liability, not a handoff — appointing an indirect representative adds a second party the authorities can pursue; it does not remove you.

Source: UCC Art. 18 (representation); Art. 77(3) — the declarant is a debtor and, under indirect representation, the person on whose behalf the declaration is made is also a debtor (joint; the text has no “main” debtor); Art. 170. Confirm Art. 77(3) against the Official Journal.

What the marketplace does and does not do

If you sell through a marketplace, it is the deemed supplier for VAT — the platform, not you, accounts for the VAT. Its IOSS number belongs to the platform, and the large marketplaces (Amazon, eBay) do not hand it to you: they transmit it to the carrier directly, precisely so it cannot be misused. Your job is the opposite of what you might expect — keep your own IOSS number off those shipments, so two numbers don’t collide on one parcel. And the marketplace does not lodge your customs declaration; the carrier or a broker does. VAT and customs are two different roles carried by two different parties.

Source: Art. 14a Dir. 2006/112/EC (deemed supplier, VAT only). Amazon/eBay transmit their IOSS number to the carrier and withhold it from sellers; marketplace does not lodge the customs declaration — carrier/broker does.