National Insurance number
The National Insurance number is used as a reference number in the Pay As You Earn system, and also by the self-employed. It is also used in applications for Individual Savings Accounts (ISAs), to check that an individual has opened only one ISA in a tax year.
Centrelink
Centrelink commenced initially as a government agency of the Department of Social Security under the trading name of the Commonwealth Services Delivery Agency in early 1997. Following the passage of the "Commonwealth Services Delivery Agency Act 1997", the Centrelink brand name came into effect in late 1997. Offices were established nationally to manage services to people in need of social security payments.