Terrell, TX Estate Planning Law Firms & Lawyers

If the house is not in your mother's name, it is already owned by you, one sister and the other sister's estate.  If there is more in the estate than the house, you will have to probate the Will to get it.  Contact a probate attorney who practices in the county in which your mother lived and died.

In Texas there are a couple of questions that need to be asked. Was the house community or separate property? Next are there children outside this marriage, such as a previous marriage? Since you say it is your mother and father, I will answer as if your sisters are also the product of this marriage. If the house is community property, it belongs to your mother. If the house was your father's separate property, it belongs to you children. She however, has the right to live in it all of her life. Whether her stay in the nursing home is sufficient to remove that right, is a whole different question.

Your lawyer is right, your Letters Testamentary should be sufficient. Banks live according to their own laws, however, and don't give a rip for the laws enacted by the legislature of the State of Oregon. Your choice is to pay a lot of money to have your lawyer argue this with Bank, or pay for another death certificate to give to bank. Get the death certificate.