Grab your local phone book and a notepad, and look up your county's registry of deeds local office and call and ask the clerk for the address to their main office where the house deeds are kept. Most registry of deeds offices are in the county courthouse or near the courthouse.
Write down the address of the property that you want to find out which bank owns and go to your local registry of deeds office. The registry of deeds office is a public office so all of the documents are public records and accessible.
Look through the deeds by the address of the property that you are researching and when you find the deed, the deed should contain the homeowner's name and all basic property information that will also include the bank that owns the property.
Write down all the necessary information that you will need, including the bank name and you will now be able to go to the proper bank about the property.