You have a multitude of issues, here. I do not believe you are going to be able to get much guidance on Avvo. You need to contact a probate litigation attorney in the county where your grandmother resided to determine what your options are and how best to proceed.
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It does not appear that the money was in the probate estate.
Your best solution would be to hire an attorney to review
all the information you have and help you devise a plan of action.
The answer given does not imply that an attorney-client relationship has been established and your best course of action is to have legal representation in this matter.
It appears you need to consult with an attorney in PA. If you are a co-executor, appointed by the court, you should talk with your attorney
R. Jason de Groot, Esq., 386-337-8239