During international transport (by road/rail/sea), our carrier was fined a substantial amount (>£500) by customs for allegedly failing “to show a chemical name after an N.O.S.” on the Dangerous Goods Note (DGN) that we had provided (copy supplied) for the Class 6.1, UN2811 TOXIC SOLID, ORGANIC N.O.S. substance. The Proper Shipping Name (PSN) was followed by the Colour Index (CI) Name of the substance we supplied. The carrier is insisting on passing the fine back to us. Were customs correct in levying this fine?