i reside in california . i had a son with a woman i never married. he went through a malpractice suit from injuries he obtained at birth and was awarded an estate. 7 years later after living on and off with mother . i recieved custody of my son and other kids because of substance abuse on her part . i went through childrens social services to recieve custody . during this process i found out through a blood test my son was not my biological son ( the mother is unaware of this test ). of course i continued to be his father . i was named the presumed father or defacto father in the court custody papers . now , 10 years later my son passed away . currently we are in probate . for the first time in 17 years the mother is claiming me not being the biological father . and attempting to claim i have no rights to the inheritance of my sons estate. on my sons birth certificate my birth name is on it as his father . there is a plethra of evidence i have claimed him as my son . so do i have equal inheritance rights to his esate or not ? thanks.