How to verify shipping labels and invoices when cross-border orders are missing IOSS and VAT numbers?

Missing tax information is the biggest headache for European small packets. An order might look normal in the store, but if the IOSS or VAT fields are missing when it reaches the carrier's system, it could lead to returned shipments or double taxation during customs clearance. I start by checking the tax settings at the order source to see if the platform has already collected the tax. The…