Owner - Finance Home did not pay the bank

[Maximiliano Rodriguez]

Case: Bank is foreclosing on property “Normandy”, the property is under “Teresa” owns the loan with the bank. At Normandy lives “Maria” who claims be the owner of the house and who has been paying the house for the last 4 years with no delays to “Teresa” – Owner Finance.

What are options for “Maria” and what documentation should have to prove ownership and save the house?