Since I do not live in the US they could not do a proper screening on me.

I also screen, screen, screen my tenants before I rent.

It sounds like to me the landlord and the property manager are on the inexperienced side some and tenant is a professional one wheeling and dealing.Tenants that are scammers can sniff out new blood a mile away.

I am getting set up with WilliamPaid for tenants that don't want to mail checks or deposit at the branch and have a local service that does tenant screening for me.  

Not knowing if he can qualify on his own means you may need to re-evaluate your screening process.

I was a home owner in the Michigan area at the time and I know my particular property value dropped about 40-50% alone, so I certainly am not oblivious to how much of blood bath it really was, but I also know (think) that certain states were hit a lot harder than others. 

After all I did screen them and allow them to move into my property.

The "50% rule" is simply a screening tool to allow you to see when the seller is jerking your chain.

How do you all handle that.My question is...What questions do you ask the caller to screen them before you show the property?

Get out from behind the computer screen and go out in public.