Detailed information about becoming an Australian citizen is available from the Australian Department of Immigration and Border Protection (DIBP) website.
An online Citizenship Wizard is also available on this website to help with citizenship questions.
From 1 July 2009, all citizenship by descent applications for nationals and residents of Austria, Bosnia & Herzegovina, Czech Republic, Hungary, Kosovo, Slovakia and Slovenia are processed at the Australian High Commission in London.
Resumption of Australian Citizenship
Renunciation of Australian Citizenship
Note: Australian passports and travel to Australia
Once a person becomes an Australian citizen, he/she is eligible to apply for an Australian passport.
Australian citizens entering Australia should do so on an Australian passport. Please note that it is not possible for an Australian citizen to be granted an Australian visa even if that person is also a citizen of another country and wishes to travel on that country’s passport. For more information, see: http://www.passports.gov.au/Web/Forms/EntryPoint.aspx