My Father passed away before I was born. 6 years later my grandfather (his father) made a will excluding my deceased father and his children. Both grandparents have passed now my uncle wants me to sign a paper saying I will not contest the will and will recognize him as the executor. I want to know is there anyway I can challenge the will so I can inherit some of the estate. They left everything in the will to their surviving children(my aunts and uncles) minus my deceased father.