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.419 scammers often mention false addresses and use photographs taken from the Internet or from magazines to falsely represent themselves.An email subject line may say something like "From the desk of barrister [Name]", "Your assistance is needed", and so on.
The scam has been used with fax and traditional mail, and is now prevalent in online communications like emails.The number "419" refers to the section of the Nigerian Criminal Code dealing with fraud, the charges and penalties for offenders.Sometimes psychological pressure is added by claiming that the Nigerian side, to pay certain fees, had to sell belongings and borrow money on a house, or by comparing the salary scale and living conditions in Africa to those in the West.Much of the time, however, the needed psychological pressure is self-applied; once the victims have provided money toward the payoff, they feel they have a vested interest in seeing the "deal" through.If a victim makes the payment, the fraudster either invents a series of further fees for the victim, or simply disappears.
While Nigeria is most often the nation referred to in these scams, they originate in other nations as well.One variant of the scam may date back to the 18th or 19th centuries, as a very similar letter, entitled "The Letter from Jerusalem", is seen in the memoirs of Eugène François Vidocq, a former French criminal and private investigator. One of these, sent via postal mail, was addressed to a woman's husband, and inquired about his health.Another variant of the scam, dating back to circa 1830, appears very similar to what is passed via email today: "Sir, you will doubtlessly be astonished to be receiving a letter from a person unknown to you, who is about to ask a favour from you...", and goes on to talk of a casket containing 16,000 francs in gold and the diamonds of a late marchioness. It then asked what to do with profits from a .6 million investment, and ended with a telephone number.For example, in 2006, 61% of Internet criminals were traced to locations in the United States, while 16% were traced to the United Kingdom and 6% to locations in Nigeria.One reason Nigeria may have been singled out is the apparently comical, almost ludicrous nature of the promise of West African riches from a Nigerian prince.According to Cormac Herley, a researcher for Microsoft, "By sending an email that repels all but the most gullible, the scammer gets the most promising marks to self-select." In Nigeria, scammers use computers in Internet cafés to send mass emails promising potential victims riches or romance, and to trawl for replies.