Our 1yr son has AU birth certificate doesn't contain father's name in Given Name part. Bcoz of that his passport came with same info. However we want his father's name to be included in his given name on both birth certificate and passport.
It seems for name change its $179 fees on new birth certificate.
Not sure how much fee to change given name on passport?
How much time it takes to get name changed on birth certificate and passport?
Name change: check out NSW Registry of Births Deaths & Marriages http://www.bdm.nsw.gov.au/ or the equivalent in other States.
Passport name change: check out Australian Passport Office https://www.passports.gov.au/passportsexplained/theapplicati…
Give them a call. I am sure they will give you the right answers.