Attached is a copy of the Deed of Trust executed by John Doe and Jane Doe,
If that document appears Kosher (i.e. the property owners signed away their right to collect rents, in case of default AND default has taken place i.e. you have a copy of NOD), I think you are on good legal ground to send your rent to the Assignee (the one who sent that letter).
I am still curious! Can you post that Deed of Trust too? You don't even have to hide any names (unless you want to) since it is a publicly recorded document.
