Medicare fraud has adapted into complex schemes over the years, moving from medical equipment and HIV infusion fraud to ambulance scams, as crooks try to stay one step ahead of authorities.

WSJ: 89 charged in Medicare fraud busts in 8 cities

And the government should do more to publicize and alert us about Internet scams, fraud, and fake work-at-home schemes by creating a Virtual Work Hotline.

FORBES: The New World Of Work: Time To Think Virtually

The Federal Bureau of Investigation has already warned computer users of Japan relief scams, including charity fraud schemes.

FORBES: Cyber Crooks See Huge Opportunity In Japan's Tragedy

She is charged with lying to FBI agents investigating charity scams after the agency interviewed her about suspected wire fraud.

BBC: NY woman in Newtown 'charity scam'

Monday, we'll look at these weapons against fraud and get advice on which ones work and which ones are scams in their own right.

NPR: Identification Theft: The Growing Scam Industry

Such advance-fee frauds are also known as "419 scams" - named after the section of the West African country's criminal code that prohibits fraud.

BBC: NEWS | Africa | Bank scam trial opens in Nigeria