Calls to this tip line should be limited to fraud activity and corruption by businesses or persons engaged in purported contract fraud, procurement or purchasing fraud, and/or fraud of federally funded programs.

We have seen a five-fold increase in our caseload since 2000, ... We went from 4,000 complaints a year, from 4,000 referrals a year to 17,000. And we think that's just the tip of the iceberg.

The best thing to do is to know the Internet address of the company or the NGO, the non-government organization, that you're dealing with and type that in yourself rather than clicking on a link.

I haven't seen anything like this in 23 years.

The emphasis here is on 'unsolicited,' things that come in that you didn't -- you have never made contact with this particular charitable organization.

That's not a reason unto itself to conclude that that's a scam Web site , but it is a reason to be cautious.

Peeling back the layers that accompany these various scam websites and trying to get right directly to the perpetrators.

Just like these natural disasters bring out the best in people, they also bring out some of the worst elements of the criminal element out there who are willing to take advantage of those who are willing to give and those who so desperately need the relief.