If you are a business owner, you may get an unsolicited letter from con artists in Nigeria in which they claim to have a large amount of money they need to get out of Nigeria. In the letter, they ask you for your business letterhead, bank, and business bank account so they can supposedly deposit this large sum into your business account and draw it out a few days later, effectively moving the money out of Nigeria. For your cooperation, the con artists promise to leave several million dollars in the account after the transfer is completed. Of course, the scam is that no money is ever deposited. You may wish to turn the letter in to your local post office since it constitutes mail fraud.
Prosecution is very difficult with scams originating from other countries.
Such solicitations should be given to the local post office to investigate as mail fraud.