Paying the Mortgage But Not on the Deed or Loan

If you are the person who isn't on title, isn't on the mortgage and is making payments on the house, the best answer I can give you is "see a lawyer." Beyond that, the answer is, probably not. Unless there is some kind of written agreement with the person who owns the property which grants a security interest in the property in exchange for the monies lent, this would likely be considered an unsecured debt -- if can be proven that there is some kind of debtor-creditor relationship in the first place.