I have a client which has an ITIN. He was asking me that one of the clients he does work for asked him if can complete a FIAN form for them.  He ask me if he should or not.  I ask him that they might of being requesting a W9 but he told me he was really sure they request a FIAN to be completed by him.  Does any one know any thing about this? I did some searching and I couldnt find a form with that name.