Where a life event occurred in NSW, you can apply to add, correct or modify registered information if it is not a "family history" record:
Apply to correct an entry
Apply to add a parent to a birth certificate
Each parent must provide at least 3 individual forms of ID from the list below with the application.
At least one form of ID must be provided from Category 1 and must contain your full name, date of birth and place of birth.The other forms of ID (at least two) must be provided from Category 2 and 3, or 3 and 4.
If born in Australia:
Record of immigration status: