I have got appointment letter and agreement from Nigeria AGIP oil Company and Oil Firm Nigeria Ltd, without any interview with salary USD 21920.00 per month after verification from my friends and online i came to know its fraud company's please make aware our people to don't spent money any Nigeria oil company's like that please go through the link this i got from google:

http://www.oilcareers.com/content/community/board/view.asp?mode=viewtopic&topicID=1461

They are giving immigration mail id of Nigeria once i contact them they are sending mail to transfer money through western union money bank but i never did.