However, Australians can also request a paper form if they prefer.Generally, one person per household will complete the Census, but separate forms can be requested for privacy reasons.Census data is used to inform decisions about language services, settlement support, transport, schools, health care, infrastructure and business However, Australians who are overseas on 11 August do not complete the Census.Generally, one person completes the form on behalf of their household.Allen said that allows the ABS to collect information on "who might be staying over at a friend's house or gran's house" on Census night."So it's not just a Census of people