What happened?

The WCO announced on 26 October 2026 that its Technical Committee on Customs Valuation adopted Advisory Opinion 28.1 at its 12–16 October session. It concerns additional documents found during physical inspection that indicate a different price actually paid or payable.

Key details

According to the announcement, verified additional documentation should underpin valuation using the transaction value method. Verification of its truth and accuracy is a condition, not a detail to omit.

Who is affected?

T&M analysis: Importers, customs brokers and finance teams handling cross-border goods should use this development to review the consistency of their supporting records.

Effective date / timing

The opinion is due to go to the WCO Council for approval in June 2027. The full text is awaiting publication. Committee adoption should not be treated as an immediately binding GCC rule or a new local filing deadline.

Why it matters

T&M analysis: Conflicting records can leave a business unable to explain the amount declared. A document trail should connect the purchase order, commercial invoice, payment evidence and customs declaration, with an explanation for any difference. The announcement alone does not establish how a particular national authority will handle a dispute.

Business impact

T&M analysis: Assign responsibility for investigating differences before a declaration is submitted. Retain the reason for revised invoices, credit notes, discounts or later price adjustments and the evidence supporting the amount used. Agree how the importer and broker will escalate inconsistent documents; do not assume a broker can resolve a pricing discrepancy without the commercial records.