This happened last year see....
http://news.bbc.co.uk/1/hi/england/dorset/4586756.stmHowever I have received an email from a friend that it is happening again. As Christmas is approaching it is best to be aware. This is how it works.
A card is posted through your door from a company called PDS (Parcel Delivery Service) suggesting that they were unable to deliver a parcel and that you need to contact them on 0906 6611911 (a premium rate number). DO NOT call this number, as this is a mail scam originating from Belize .
If you call the number and you start to hear a recorded message you will already have been billed £15 for the phone call. I have been reliably informed that this number is..... 0906 661 1911 is -
SuperPremium £1.50 per min (p0) (inc VAT)
In other words don't get caught!