When there has been a loss of contact over time with a family member however they are not a missing person by definition, the following search agencies may be able to help in locating them.
Salvation Army Family Tracing Service
Operates a worldwide search network for family members that have lost contact with relatives. Also provides a service (NSW Only) for people separated by government intervention.
Australian Red Cross
Conducts worldwide searches through the International Red Cross/Crescent Movement in approximately 177 countries.
Provides reunion services to adult Aboriginals separated from their families and cultures by government intervention policies such as adoption, fostering or institutionalisation.
International Social Services
Helps trace family members separated by adoption or other legal intervention, international child abduction and voluntary or forced migration.
Department of Foreign Affairs and Trade (DFAT)
Provides advice and assistance where there are serious concerns for the safety and welfare of Australians overseas.