Other official-looking letters were sent from a writer who said he was a director of the state-owned Nigerian National Petroleum Corporation.
He said he wanted to transfer $20 million to the recipient’s bank account – money that was budgeted but never spent.
An advance-fee scam is a form of fraud and one of the most common types of confidence trick.
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 requires in order to obtain the large sum.
To help persuade the victim to agree to the deal, the scammer often sends one or more false documents bearing official government stamps, and seals.