No disrespect to any Nigerians on the forums, but Nigeria is commonly considered to be the most crooked country on the planet!. NEVER get involved with a Nigerian, or anything to do with Nigeria!.
My younger brother used to work for one of the main UK banks, and he was involved (at one time) in setting up a database for different types of fraud. Obviously he had things like 'credit card fraud', 'cheque fraud' - but he had a catagory 'Nigerian Fraud' as well