Third Country Invoicing (TCI) refers to the arrangement where an invoice that accompanies the Preferential Certificate of Origin (CO) and used for the clearance of goods in the importing Party, is not issued from a company located in the exporting Party but from another country that may or may not be a Party to the same FTA. In some FTAs, TCI is commonly referred to as Third Party Invoicing. An example with graphical illustration can be found in the Handbook on Rules of Origin for Preferential Certificates of Origin page 18 located here.