the bank gets an appraisal from a certified appraiser, they do not rely on the borrower for a valuation
anyone who has bought a home knows this
I've never owned a home, and I even knew it.
Actually.. if your credit is good enough, and you have a good ongoing relationship with the bank, the bank will take a rather simple personal statement alone.
I have bought many rental properties over the years with a rather simple one-page statement of my current financial state and the most basic of numbers on the proposed deal.
The bank is in the business of lending money. People who borrow are how banks make money. They are looking for people with good credit and high net worths who they can lend money too and collect interest off of. And once you have established a track record with one, it gets easier and easier as you build up trust with them.