Mortgage exemptions are handled in the St Joseph County Auditors Office, which is located on the 2nd floor of the County-City Building (227 W Jefferson Blvd, South Bend, IN. 46601).
You will need the recording number, date it was recorded, amount of the loan (if any) and name of loan company. The Recorders office can provide you all this information either over the phone 574-235-9525 or in person.
Questions about exemptions should be addressed to the Auditors Office 574-235-9529.