This is a useful link if you need to transfer a .au domain from another registrar, or just forgot you domain key/password/secret and need to find it. This will email you the domain key regardless of the registrar: http://admin.auda.org.au/password_recovery/blank_recover_password.jsp

It is also a useful tool if you current register or web host won’t give you your domain password/key/secret, and you wish to move your domain away from them.