The current landlord may no longer be the owner if they sell the house in a standard market sale, short sale, or via a quit claim deed. They may also lose the house to foreclosure at the trustees sale or voluntarily with a deed in lieu of foreclosure.
Since your question is from 2011, how did things work out for you and what did you find as the best way to get notified of the transfer of ownership?... more
A couple I have seen used around here are Field Asset Services http://www.fieldassets.com/become-a-vendor and LPS https://www.lpsfs.com/fs2/FieldServices/QualityControl/tabid/69/Default.aspx
Hope that helps you get connected with the right people.... more