Australian Securities & Investments Commission (ASIC)
Regulator of the Australian financial services industry. Oversees banks, credit unions, building societies, general insurance and reinsurance companies, life insurance, friendly societies and most members of the superannuation industry. ASIC provides information to consumers and can deal with complaints from consumers about misconduct by service providers.
ASIC Connect (company search): http://asic.gov.au/online-services/search-asics-registers/#companies
Money Smart: https://www.moneysmart.gov.au/
Locating unclaimed money: http://www.asic.gov.au/for-consumers/unclaimed-money/