He is a Crude Oil Buyers' Mandate for several giant U.S. and European crude oil and petroleum products buying houses and refineries, and a Consultant, as well, to private investors, entrepreneurs and corporations on how to obtain genuine crude allocation and license with the Nigerian authorities to become an authorized seller of Nigerian crude oil. He has been severally dubbed the "unofficial anti_scam czar" and the "conscience of the business" in the modern Internet petroleum trading market.
At the end you should sign off with "sincerely yours" or any other related salutation. If you are writing a letter of intent for graduate school then it would have a different content. First of all letter of intent would start with your name, address, contact number and email address. After you have mentioned the date, you should then add a salutation like "Dear Sir/Mam".