You can report your suspicions in confidence using our reporting form.
Please complete as much of the form as you can. But do not worry if you cannot answer all of the questions - and do not put yourself in danger by trying to discover more information.
Any information that you provide will be handled in confidence. You can give us your name and address if you wish, but you do not need to do so.
Alternatively, you can phone the Customs Hotline on 0800 595 000. Calls are free from landlines in the UK, and can be anonymous - you will not need to give your name or personal details.