
The Federal Bureau of Investigation (FBI) states that "An advance fee scheme occurs when the victim pays money to someone in anticipation of receiving something of greater value - such as a loan, contract, investment, or gift - and then receives little or nothing in return." There are many variations of this type of scam, including the Nigerian prince scam, also known as a 419 scam. If a victim makes the payment, the fraudster either invents a series of further fees for the victim to pay or simply disappears.

The scam typically involves promising the victim a significant share of a large sum of money, in return for a small up-front payment, which the fraudster claims will be used to obtain the large sum.

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