They are everywhere and it is wise to not disclose any of your personal information whatsoever. Be cautious of an interview from another country that will not allow you to view them in a cam, or is unable to call you directly, or give a business license number, they are extremely clever. No birthdays, Social Security Numbers, Debt/Credit card numbers, give nothing of where you are banking, none of these should be given without some concrete proof that this is a job offer that is able to pay for your labor.