In Reply to: Yes u do have to change by deed poll posted by Nattsy on Sunday, 9. October 2011 at 13:01 Bali Time:
Now just called a legal name change via the Registry of Births, Deaths and Marriages (RBDM).
"Married overseas
If you were married overseas and want to use your spouse's name, you may need to register a name change, as some organisations may not accept your non-Australian marriage certificate"
Not married overseas - marriage certificate issued in Australia (after registration of marriage with RBDM) is ok to change passport name etc