BENEFIT fraud costs Yorkshire's taxpayers £85m a year.
And the authorities want people to tell them about cheats.
Although 2,804 people were punished or prosecuted in the county between 2002 and 2003, many other cheats continue to steal.
Fraudsters account for £2bn of public money every year in Great Britain - £80 for every family.
A new advertising campaign warns cheats about a crackdown.
Investigators can shadow suspects and even visit workplaces.
Tip-offs to a new fraud hotline saw actions against alleged fraud in Yorkshire more than double between 2002 and 2003.
Nationally, 32,000 people who cheated on their Income Support, Jobseekers Allowance and Housing Benefit were prosecuted or found out last year.
Fraud in Income Support and Jobseekers Allowance has been cut by 38%.
Anyone with information on suspected cheats should call 0800 854440.