Do I Need a CN23? You need to use a CN23 form if your goods are being transported outside of the UK and have a value greater than £270. Mark Sheahan2023-11-23T15:22:54+00:00What is a Customs Declaration CN23 Form and how to fill it?| Share This Story, Choose Your Platform! facebooktwitterlinkedinreddittumblrpinterestvkEmail