My brothers and myself have received a Last Will and Testament. After almost a year of my fathers passing, his girlfriend, who he was never married to, but were together for 19 years, went to her local courthouse and filed the will for safe keeping. At that time, she was charged with (Without going in full detail) pc 171b(a)(1). The date of the will is signed September 12th of 2012. He passed October 2nd of 2012. In which he had a stroke September 30th and was basically unconscious and passed in his sleep a few nights later. During the time of the will being signed, he was on a pain patch implanted in his back. Where every other hour or two, the patch released morphine and other drugs. He would be in and out of sleep most of the day and night.I apologize for not giving full detail. I was in the process of writing out the full question, but I was given an error and the page reloaded on me. My question is, what can we do to contest a will in which we believe my father was under duress and undue influence during the time of him signing the will? We do not know what to do, what steps to take and where to go from here. She has already sold many things of my fathers, in which has resulted in at least 80,000$ or more. Including his car and other things. The will that was given to us is not notarized, nor initialed from my father. Just his signature. We believed at first that the signature was not authentic, but because of him being heavily medicated with morphine and other drugs, this could have caused the signature to not look authentic or invalid. We are trying to carry out our fathers will, but we are not able to do so with such limited information because his girlfriend is refusing to speak, communicate or keep in contact with us.