Article 13
1. Member States shall, in case of suspicion, request the importing third country to confirm receipt of the dispatched shipment of firearms, their parts and essential components or ammunition. 2. Upon request of a third country of export which is a Party to the UN Firearms Protocol at the time of the export, Member States shall confirm the receipt within the customs territory of the Union of the dispatched shipment of firearms, their parts and essential components or ammunition, which shall be ensured in principle by producing the relevant customs importation documents. 3. Member States shall comply with paragraphs 1 and 2 in accordance with their national law or practice in force. In particular, with regard to exports, the competent authority of the Member State may decide either to address the exporter or to contact the importing third country directly.