Hang on to your rent money. Make sure you know for sure that the bank owns the house.
Tell old landlord u know the bank owns it.
you can wait for the bank to ask you to vacate or you can sit tight and wait until they re-list it for sale.
A real estate agent will probably contact you.
the bank will sell the property - sometime it takes awhile for them to get an agent assigned.
Once that happens, they may or may not evict you.
You can try contacting the bank directly if you have a contact number on the notice u received.