He used that as proof to substantiate the tax value was too high. 

For a flip, if you find a good deal and get it locked up in your name (your problem moves down the food chain as to how you can do this with no proof of funds etc), then its possible to JV with someone with cash who will fund the purchase + rehab, since you are bringing the deal.Now ask how can you get a good deal under contract? 

Reach out to me I’d be happy to walk you through things to look out for when there isn’t a lot of ‘proof’ of anything.

The arbitrators tend to also favour tenants, and the burden of proof on the landlord is high.

In terms of HML may care for such transaction if you can proof the experience (either yours or your PM's).

Your utility company will be able to provide you proof the utilities were in her name and paid by her.

And again, always talking to other investors who've worked with them... proof of concept.

Generally to get an offer accepted, the listing agent will require a proof of funds or pre-approval letter that shows that you could close the house if you don't get a buyer.

Only asked for a “BOATLOAD” of paperwork on everything form Hoa fees to proof of insurance and leases. 

Then you can show a proof of concept.