In every street in the South East someone could be being conned out of thousands of pounds - because of scam mail.
Sussex Police have become the first force in the country to try to find out exactly how bad the problem is.
They say elderly and vulnerable people are sometimes parting with their life savings to criminals sending them letters - posing as charities, competition organisers and suppliers. The cheques they send are funding criminal gangs abroad.
Andy Dickenson reports and speaks to victim's son Chris Becket, Insp Nick Bowman and PC Bernadette Lawrie from Sussex Police.
This story also features a police interview with the late Tom Beckett.