A warehouse system already knows what shipped and where. Add packaging weights per SKU and it can produce the kilos per material and country that declarations start from, while the duty stays with the seller.
By Razvan Toma · Founder · Last checked 1 November 2026 · Sources below
The seller is usually the producer, not the 3PL. Storing stock at a 3PL generally doesn't make a seller established in that country either, so it still needs a representative there. Your data helps, but it doesn't move the duty to you.
Hold the weight of each packaging material per SKU, split so it matches what the countries ask for. Our German quotes use paper, plastic, glass, ferrous, alu, bevcarton, composite and other. Add the packing you put on at the warehouse, such as shipping boxes and fillers, because that packaging reaches the end user too.
Each order line gives you a date, SKU, quantity and delivery country. Multiply the quantity by the weight per SKU, then add up by material, country and year. Count by delivery country, not by warehouse country.
Export date, order, SKU, product, quantity and country for each seller. That's the format our spreadsheet upload takes, so a seller can bring it straight into their dashboard, where it's counted per country.
Related: Integrations
Declarations are filed per country by the producer or its representative. When a seller has no number for a country, send your partner link. Your warehouse team changes nothing.
Related: 3PL and fulfilment partners
France, Germany and Spain through one partner: a branded referral page with 20% of what your client contracts, or white label by agreement.