You folks are all late to the party. Nigerian scams didn't start with the invention of email.
In 1975, while working in the back office of an international Wall St firm, I was assigned the task of searching for the holdings of a deceased uncle of a Nigerian gentleman by the name of Onugbu C. Moulie. Onugbu never seemed to be able to come up with an account number or old statement of his uncle's, but insisted that the firm owed him money. Large waste of my time.