My mother passed away last April. My father is still living, though ill, so my sister is listed as the informant on her death certificate. My mother owned 2 houses, one of which was her mother's. Both houses were paid off, however, due to her illness she was behind on taxes. My sister just received a letter in the mail stating that she (and my father) are being sued for those unpaid taxes. In the court documents was a copy of the death certificate with her name highlighted as the informant. She has a home of her own with 3 kids and a husband and cannot afford to pay for the taxes on another house. No one was listed as an executor, so how is it that they are able to sue her for my mother's debt?