underwriter requested "proof" of free & clear ownership ???

[Derek Sperzel]

So we're trying to complete a cash-out refi on a rental we bought and rehabbed last year (BRRRR), and everything was going well until today. I got an email from the Broker, and the underwriter is asking for documentation on all investment properties proving we own them free & clear (a couple are mortgaged, but they know that). The underwriter suggested a letter from our insurance agent should suffice, but they have no idea if we have loans on certain properties, unless they collect policy premiums from escrow. I don't understand what I could provide to the underwriter to satisfy this request, and any thoughts would be much appreciated.