1. UKTZED code. Do not determine it "approximately". One wrong digit = a 5–15% change in the duty rate.
  2. Customs value. State the real transaction price. Do not understate or overstate it — customs compares it with its database.
  3. Contract and payment currency. They must match or be logically justified.
  4. Country of origin. It determines the preferential duty rate. A certificate of origin is mandatory.
  5. Consignor. Must match the invoice and the contract.
  6. Description of goods. The technical characteristics must match the UKTZED code.
  7. Contract number and date. Check that they match the invoice.
  8. Delivery terms (Incoterms). They determine whether logistics are included in the value.
  9. Net/gross weight. A discrepancy of more than 3% = grounds for an inspection.
  10. Number of packages. Must match the packing list.
  11. Code of the clearing customs office. Check the broker's authority.
  12. Signature and seal. The broker's electronic signature must be valid.