You need to consult with a real estate attorney about this situation, to determine exactly what your rights and recourse are. If you were properly given a right of survivorship, then no, it cannot be taken away without your consent once you were given it--it was *your* right, and you had a property interest or right in it. Similarly, a person's name can't be unilaterally taken off a deed without the person's consent. The key issue may be what exactly were you given, and were you given it in the correct, legally enforceable, fashion. That's why you need to consult with a real estate attorney, bringing with you the deed and all related paperwork and correspondence. Good luck.