That or they have information on where you and your neighbor once lived. I have signed up for a couple of online brokerage accounts where they ask me questions

That or they have information on where you and your neighbor once lived. I have signed up for a couple of online brokerage accounts where they ask me questions about where I or my family have lived in the past. I got questions like; "At which of these 5 addresses has $BROTHER ever lived before?" And one of them was correct.