In South Australia, you can change your name after marriage by using your marriage certificate as evidence of your new name, or by applying for a formal deed poll if you prefer a legal document. Using your marriage certificate: Your marriage certificate serves as official proof that you've taken a new name. You can use it to update your driver's license, passport, bank accounts, and other records without a separate name-change application. Applying for a deed poll: If you want a formal legal document or if your marriage certificate alone isn't accepted by certain organizations, you can apply for a deed poll through the South Australian attorney-general's office. This provides an additional certified record of your name change. Update your records: Once you have your marriage certificate or deed poll, contact relevant organizations to update your details: your state-issued driver's license through SA Transport; your passport through the Australian passport office; banks and financial institutions; your employer and superannuation provider; the Australian Taxation Office; and any professional licenses or registrations. Important notes: There's no legal requirement to change your name after marriage in Australia—you can keep your maiden name or choose any combination of names. If you're changing your name for reasons other than marriage, you'll need to follow the deed poll process. Some organizations may request additional documentation beyond your marriage certificate, so it's worth checking their specific requirements beforehand.