You may have to pay somebody for it. You need to determine who owned the property last and who the heirs of that person are. If your grandmother died first, it would be your aunt's heirs (children, nieces, nephews). If your aunt, then your grandmother's children, or her grandchildren. You need to talk with a local probate attorney to sort through it. Also, your state may allow you to foreclose on the tax lien you paid. That actually might be the easiest way, except that if there are other heirs, they could pay you back and get their ownership.
Answered on Feb 28th, 2014 at 8:59 PM