You can double check the info by calling the lender/servicer

It's called an "occ knock".

I make around 500 calls per week.

Quote from @Vince Scipione: Yes, they are a popular choice where I live and work, however with the ever fluctuating cost of oil heat, many people have swapped over their boilers/furnaces to what is called a "Propane Gun" essentially it is a device that is affixed to the front of the furnace/boiler that injects the propane and ignites it.

The ones I'm very serious about I'll call and get a home owners quote and verify the current assessed taxes to give me a more accurate mortgage payment. 

De nada 😎I don't know that market at all (FYI, I don't see this is other Midwest markets where my CFO clients buy properties), but I suspect it's related to perhaps the international investors that agent may work with...they are often cash buyers as it's very difficult to borrow here if you're not a U.S. citizen.

You know those signs that say "we buy houses for cash" call them and say you are investor looking to buy a flip. 

It was a wild time for subject to transactions while interest rates were increasing, property values were increasing, and lenders were stuck and could not call loans due when a property was sold or transferred.

.📌 Tenant Calls & Leasing?

Run credit and background checks, actually call the listed referrals, and ask for bank statements.