The Liverpool Echo reports that staff at ASDA caught wind of the scam (although it doesn't say how long it took for them to notice) and decided to move packaging supplies behind its entertainment counter at the other end of the store. It was only when a local shopper attempted to buy an envelope that he was let into the secret of what actually happened. The supermarket chain has confirmed it's now a police matter, who may now be looking for the local equivalent of Ocean's Eleven.

[Image credit: lordspudz, Flickr]