Finland student visa requirements for nigerian citizens Business enterprise invitation. A business invitation letter from the sponsoring business within the desired destination country. The letter must be printed on firm letterhead stationery, tackled to "The Consulate of Nigeria, Visa Part", and signed by a senior supervisor. The business enterprise letter https://www.tumblr.com/africred/754895200092094464/studying-abroad-made-easy-with-africred-visa