Everyone's seen them -- seductive work-at-home opportunities hyped in flyers tacked to telephone poles, in newspaper classifieds, in your e-mail, and all over the web, promising you hundreds or thousands of dollars a week for typing, stuffing envelopes, processing medical billing, etc. And it’s just a phone call or mouse click away ...

Might be tempting during these uncertain economic times, but beware of any offers that promise easy money for minimum effort—many are scams that fill the coffers of criminals.

Here are a few of the most common work-at-home scams:

- Advance-fee: Starting a home-based business is easy! Just invest a few hundred dollars in inventory, set-up, and training materials, they say. Of course, if and when the materials do come, they are totally worthless…and you’re stuck with the bill.

- Counterfeit check-facilitated "mystery shopper:" You're sent a hefty check and asked to deposit it into your bank account, then withdraw funds to shop and check out the service of local stores and wire transfer companies. You keep a small amount of the money for your "work," but then, as instructed, mail or wire the rest to your "employer." Sound good? One problem: the initial check was phony, and by the time your bank notifies you, your money is long gone and you're on the hook for the counterfeit check.

- Pyramid schemes: You're hired as a "distributor" and shell out big bucks for promotional materials and product inventories with little value (like get-rich quick pamphlets). You’re promised money for recruiting more distributors, so you talk friends and family into participating. The scheme grows exponentially but then falls apart -- the only ones who make a profit are the criminals who started it.

- Unknowing involvement in criminal activity: Criminals -- often located overseas -- sometimes use unwitting victims to advance their operations, steal and launder money, and maintain anonymity. For example, they may "hire" potential victims ... without you realizing it's all a ruse that leaves no trail back to the crooks.

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For more information on Job related scams, check out this and other articles on the Department of Justice website.  Visit the job search section of StarReviews for our reviews of job related websites.