Third-party invoicing preserves preferential tariff claims when invoice not issued by exporter, subject to Certificate of Origin details. An importing Party shall not deny preferential tariff treatment solely because an invoice was not issued by the exporter or producer if documentary requirements are met. The exporter must indicate 'third-party invoicing' and include the name, address, invoice date and number, and the country of the company issuing the invoice in a separate column of the Certificate of Origin.