My mom and dad who lived in Washington State bought a revocable living trust from a trust mill company in 1995. It had a no contest clause. My dad who was my last surviving parent signed an amendment to the trust in 2011 before his death that changed the allocation of property between his children. Neither the original trust nor the amendment was signed by an attorney. I assume the original trust is binding. Is the amendment signed in 2011 binding? If I contest the amendment based on the Washington State's House Bill 1114 is there any chance I will be disinherited because of the no contest clause? I do not think either of my brothers are aware of the state of washington's house bill 1114. How should I proceed?