I am an adopted daughter. My deceased father's Will states that adopted children and biological children are to be treated the same. I was left $100, and his two biological children were each left $2000; which is a mere pittance with respect to the size of the estate.
Our father had Parkinson's disease and several years before his death he tried to commit suicide more than once. His last attempt to kill himself resulted in his being hospitalized. I believe that this speaks to his state of mind; which deteriorated further as a result of the later onset Parkinson's disease and the medication that he was prescribed.
My siblings and I have a step-mother who did everything that she could to alienate him from us and to keep things secret from us. For instance, we learned about his suicide attempt and hospitalization from a person outside of the family.
There was most assuredly "undue influence" of a very strong mind over a weak, and altered mind.
I would like to contest the Will on these grounds.