The .au domain extension is a country code Top Level Domain (ccTLD) restricted to use by individuals, organisations, or companies registered and/or residing in Australia. The .au domains are controlled by the Australian Domain Name Authority (auDA).
.au domain registration requirements
According to auDA's regulations, .com.au or .net.au domains may only be registered to Australian sole traders, businesses or companies. This means that during the registration process, you will be asked to supply an Australian Business Number (ABN), Australian Company Number (ACN), State Business Number, Trademark Number or Incorporated Association Number to prove eligibility.
Those hoping to register .org.au domains must also meet the same registration requirements. However, they are further restricted to only Australian non-profit organisations and registered charities. Australian associations, clubs, sporting groups, political parties and close equivalents may register .asn.au domain names, although such associations must be nonprofit.
.id.au is a new ccTLD extension specifically designed for Australian individual citizens or residents. This type of domain name must be clearly based on the registrants' name or nickname and photo ID is required for registration.
In all cases, the .au domain must have a close and substantial connection to the person or business intending to use it.