If your name is not on an official bank piece of paper when it comes to this property you are most likely SOL. There needs to be a contract, signed (notarized if possible) that stipulates exactly what your 'share' is in the house, what you get should the house be sold, what your obligations are to the property and what the other share holders obligation(s) too you is/are. There are mortgages that are divided amongst people, the best form this comes in is when the people form a new entity - called a corporation. Corporations are 'entities' they are 'beings' in that they have legal rights and legal responsibilities and legal abilities as an individual has. Corporation or incorporations are used all the time to conduct business along these lines. If there are 'many' people who own a share then the corporation would have its share holders, obligations specified and all of that and the corporation would 'own' the property. If there are a couple/three people, then as individuals they would all cosign onto the loan/mortgage, with specific duties and responsibilities to the mortgage holder (bank). All of this sort of stuff MUST be in legal contract written form. Without a piece of paper it becomes your word against another persons - the judge will rule with whomever has their name on the correct documents. There may be some legal action(s) you can do. You will need to speak to a civil attorney to find out what and where you need to go to start the process of getting this all sorted out. If this is a con game, then you may be able to seek prosecution of a criminal sort against the person conning you.