would an american citizen be put in a refugee camp, untill there visa is paid?

[Sue]

i think i have been got by the nigerian scam,, i befriended this person from america about 12 months ago,, i believe he was in america then,, but now he is in nigeria,, i traced the phone no when he rang me to nigeria,, he is asking for money so many lies,, and he uses computer,, in refugee camp, he says power go off all the time,, he says he is stuck there to someone pay for his visa,, 250 dollars,, i refuses,, he says he goes to galleries during the day,, what can i say to him to let him know that i know he is a lier, i am not stupid,, he is just very good at this