My father in law in a third world country wants to help me buy a house in a developed country. He has a simple loan agreement made up. He wires the money to me, say $75 K USD. I go to the bank with a copy of the loan contact. Explain where the money is from and the purpose. In a situation like this will the tax authorities in my developed country want to see bank statements from my father in law showing where he got the money? There are wealthy people in the third world. Has anyone done anything like this?