As per auDA regulations, when a domain has been sold, a transfer of ownership must take place to change the entity to which the name is registered to.
For policy compliance reasons, this process involves signing the attached Change Of Ownership Form and confirming eligibility for the domain name.
AUDA POLICY URL: www.auda.org.au/policies/index-of-published-policies/2011/2011-03
Basically it's like buying a house, you pay a price to the seller and you pay a transfer fee to transfer the title of the newly acquired asset.
Please sign and email a scanned copy to Support@DomainNames.com.au or fax it to 03 8692 6787