From another forum:
Postal Scam:

Can you circulate this around especially as Xmas is fast approaching - it has been confirmed by Royal Mail. The Trading Standards Office are making people aware of the following scam:
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 £315 for the phone call.
If you do receive a card with these details, then please contact Royal Mail Fraud on 020 7239 6655 020 7239 6655 .For more information, see the Crime Stoppers website:http://www.crimestoppers-uk.org/crim...-delivery-scam