My brother in overseas has a loan on the property. He's then topping up on the same loan and asking if I can be a co-applicant. I won't be paying anything and the interest is paid all by him. I was wondering what tax implications it might have as a co-applicant, if the loan amount is 70k or 100k or any amount. Should I need to fill FBAR? I assume it won't affect my credit score etc as the loan is taken overseas. Correct? thanks.