If there is one thing that Monopoly has taught us its that a bank error in your favour is a good thing. Unfortunately in real life if you find several thousands of pounds in your account then you should tell the bank and give it back or you could be arrested. An Australian couple did just the opposite. On finding that they had received a payment of £4 million from the bank they simply disappeared. The bank has recovered some of the money but the couple still have around £3 million of it. An international search has now been launched for them.