K1 visa nigeria Company invitation. A business invitation letter from the sponsoring corporation within the spot state. The letter should be printed on business letterhead stationery, addressed to "The Consulate of Nigeria, Visa Part", and signed by a senior supervisor. The small business letter must adhere to the following recommendations: https://www.tumblr.com/africred/754895200092094464/studying-abroad-made-easy-with-africred-visa