What is CNF Probability? CNF refers to Confirmation on the IRCTC website. The CNF Probability is a carefully curated percentage chance of a particular waitlisted train ticket. It tells you whether the ticket will be confirmed before or during chart preparation. Several parties are involved in international shipment. But the main decision requiring active involvement of all parties is shipments. There are two major terms of shipment widely used round the globe. These are freight on board (FOB) and cost net freight (CNF). Other terms such as cost net insured (CIF) and cash against document/delivery (CAD) are also used. Based on the relationship between ... CNF stands for Confirmed, indicating a guaranteed seat or berth, while RC stands for Reservation Against Cancellation, implying a provisional reservation. Learn how to book confirmed tickets online with HDFC Bank's PayZapp app and get rewards and cashback. CNF means cost plus freight and means the seller pays for transporting the goods to the destination port, but the buyer bears the risk and cost after unloading. Learn how CNF differs from FOB and CIF, what are the advantages and disadvantages, and how to use it correctly.