From 1 November 2026, EU customs requires a seller product code and a manufacturer product code on every item of a B2C parcel entering the EU. Parcels missing them can be held at the border.
Two new optional fields are now available alongside SKU: MPN (the manufacturer's own product code) and Barcode (GTIN, EAN, UPC, JAN or ISBN).
You'll find them in the Ordered items section of the order page, when viewing, editing, or adding a product.
Also available through CSV import (new ProductMPN and ProductBarcode columns) and through the API on POST /orders and POST /shipments.
※ Please note: sending these values to carriers as part of the customs data, from both the app and the API, will be rolled out in upcoming releases. We are preparing for the 1 November 2026 deadline and will announce it in the release notes once it is available.
