Certificate of Origin verification allows importer queries, exporting authority assistance, questionnaires, site visits, and detailed requests when origin is in doubt. Verification of the authenticity and correctness of a Certificate of Origin may be undertaken by the importing Party through requests for information from the importer, assistance from the exporting Party's competent authority, written questionnaires to an exporter or producer, exceptional premises visits, or other agreed procedures. Where assistance is sought, the importing Party may request verification of the certificate, related origin information, and cost breakups, after first seeking information from the importer where possible and specifying whether verification is random or based on doubt. The procedure also applies to goods already cleared for home consumption under preferential tariffs.