The "Nigerian" Scam  also called "Advance Fee" Scam
  In this  email the  scammers request help to get large sums of money out of a foreign country. They  promise you big profits in exchange for your assistance but before you receive  anything, you'll have to provide money to cover the transaction, transfer and  legal costs plus you'll need to provide them with your bank account numbers. The "Nigerian" Scam: Costly Compassion from the Federal Trade Comission  (FTC) has more information.
Advance-Fee Loan Scam
  These emails promise that a loan or credit will be  approved even if you've been turned down many times already. But in order to  get this loan you have to pay a fee. Advance-Fee Loan Scams: 'Easy' Cash Offers Teach Hard  Lessons from  the FTC has more information.
Work-at-Home Scams
  These emails promise a steady income with just a little  work in your spare time. Common schemes are envelope stuffing, email  processing, assembly or craft work, and medical billing. You may have to pay a  "fee" for materials, instructions, or equipment. Fall for any of  these offers and you'll probably be out of money instead of earning any. Work-at-Home Schemes from the FTC has more details.
Foreign Lotteries
  These emails either promise great odds or indicate that  you've won money in a lottery in another country. You will have to pay to get  your prize or collect your winnings. International Lottery Scams from the FTC has more  details.  A variation on this scam  assures you that you’ve won an iPad or other desirable product but, before you  can collect it, you have to pay a fee.
Check Overpayment Scams
  Someone responds to your ad or online auction posting,  offering to buy your item. The catch is that for some reason, the check you'll  receive is for more than the purchase price. They want you to wire them back  the difference. Check Overpayment Scams: Seller Beware and Be Suspicious  About Wiring Money Back After Cashing a Check from the FTC have more information.
Counterfeit Check Scams
  These scams are another version of the Nigerian or advance  fee scam. If It Sounds Too Good To Be True, It Is: How to Protect  Yourself Against Cashier's Check Fraud from the American Bankers Association Education  Foundation has more information.
Investment Schemes
  These emails offer so-called investments with high rates  of return and little or no risk. Usually there is little detail about the  investment but lots of details about how much money you can make. Investment Risks from the FTC provides tips to help you spot these  fraudulent pitches.
  These sites describe these and other scams.
    - OnGuard Online: Email Scams has more detail about spam  scams and links to other resources.
- LooksTooGoodToBeTrue.com describes these and many other scams on their fraud page.
- Test your scam knowledge with the quiz: Spam Scam Slam – Don't be Fooled. It's from OnGuard Online.