My estranged father passed away over 3 years ago and left no will and a small bank account with just under 10k in it. My older brother does not want to be contacted by anyone concerning this he does not feel we should take anything remotely connected to our father. Needless to say he has hard feelings. He will not cooperate in waiving his right to any part of the estate can my sister and myself still proceed with the probate without his waiver?