It can be that the current user is just try to act like the main user, you'd ask if this same account has collected loan before and pay back, because you can use this act of his to judge if he's fake or not. After taking the loan what's next? He runs off abandoning the account, scammers don't care what happens next, all they know is their selfish gain.
OP since you discovered the address he used is different should be a warning sign not to even start up anything with him or her, is best to keep a very close eye on that account and I wish others would avoid that account until proven otherwise. Is best you do any business deal with someone who's active and consistent in the Forum.