Originally Posted by
alanR
Birth certificates prove nothing - ask Frederick Forsythe & John Stonehouse.
You'll need a chain of evidence that shows your mother is the person named on the birth certificate.
If she is travelling on an Oz passport then she must have, at some time, become naturalised as an Oz citizen. Prior to that, unless a child, she would have had to have a passport in order to travel to Oz in the first place
Ok, but I have already proved she is my mother to get my right of Abode. My birth certificate proved that my mother was the person named on her birth certificate.
She was born in 1948 when Australian citizenship did not yet exist, when it came into effect on Jan 26, 1949 she automatically acquired it as both her parents were Australian, although she had not yet been to Australia.