Sanity check? Banks don't do that. They employ lawyers to check facts.
What they do is they have qualified real estate assessors actually assess the property value based on government filings (square footage, rooms, so forth) not based on the owner's best guess of what it is worth, etc. They don't issue loans based on what you guess your house is worth, if they do they are not doing their due diligence and would never pass stress tests. They don't employ lawyers for this part of the loan process they employ real estate assessors. It's idiotic to assume that banks would give you a loan because you said your house was worth eleventy-billion when it is only worth eleventy-million.