Detailed information about Cargo Tracking Note Cargo Tracking Note or the Advanced Shipment Information (CTN/ASHI) is required by over 20 countries in west and central Africa. Although the procedure and duration of obtaining CTN vary, the importance of the certificate is even across all countries. Here are all the features of the CTN certificate that you need to know. What is Cargo Tracking Note? Cargo Tracking Note or simply CTN document is an official loading document a num