Verification of origin procedures permit authorities to obtain documents, conduct premises visits, and require producer cooperation. Verification of origin procedures permit the importing Party's customs authority to request written verification from the issuing authority of the exporting Party, including documentary evidence and questionnaires; producers and exporters must provide information to establish CIF value of non-originating inputs and confirm production processes. Where documentation is insufficient, the importing authority may seek facilitated visits to producer premises, with advance provision of documents, accompaniment by the issuing authority, possible neutral specialist observers, and the preparation of minutes and a visit report; limited postponement and additional cooperative measures are allowed.