When I first spoke with them and asked if they are a lender, the response is "we do make loans," or something along those lines, but it was not disclosed that they are in actuality a broker.

Some are disclosed on the site, but it's not guaranteed they are all there.

The only thing that is disclosed is the upset value and that is usually not even the opening bid so plan on going up.

Will i have to disclose these payments in court during the hearing or do i just say he is behind rent since august. 3.

You need to disclose it either way, why pass on something you know is bad to the next person?

Depending on your loan structure I'm not even sure you could legally offer a personal guarantee outside of the loan for that money without committing mortgage fraud, as anything that could hinder the ability of the primary lender to recover their principal is supposed to be declared during their diligence period, and any material changes up to the point of taking the loan are supposed to be disclosed as well.

I have since strongly advised my tenants that I do not disclose their personal info to anyone who calls me I expect reciprocity and my personal info is not to be given out to anyone.I’ve actually had agents approach me either at home or if I’m at my rentals and tell me the same I have a buyer for your house pitch.

Obviously the place is totally derelict so not much to disclose (basically check yes to everything being wrong lol) but I was just curious for the future. 

But we were told Graystar management has a policy that they don't disclose any rental history even with a signed release of info by the tenants?!

This was not disclosed to me before the purchase and now I'm finding myself in a situation that could end in serious financial harm to myself.