NAME CHANGE INFO for Marriages in NSW: (is similar for other states in Australia) On your wedding day your I will present you with a Certificate of Marriage signed by you and two witnesses. It is pretty, and is a legal one of a kind document that cannot be replaced under any circumstance, BUT unfortunately it is no longer accepted for name change purposes. After the wedding I will register your marriage within 14 days. Then at your request, if within 8 weeks of the wedding, a