Authorised Deposit-Taking Institutions (ADIs) are corporations which are authorised under the Banking Act of 1959 to take deposits from customers.

ADIs include banks, building societies and credit unions. All ADIs are subject to the same Prudential Standards but the use of the names 'bank

Bank

A bank is a financial institution that serves as a financial intermediary. The term "bank" may refer to one of several related types of entities:...

', 'building society

Building society

A building society is a financial institution owned by its members as a mutual organization. Building societies offer banking and related financial services, especially mortgage lending. These institutions are found in the United Kingdom and several other countries.The term "building society"...

' and 'credit union

Credit union

A credit union is a cooperative financial institution that is owned and controlled by its members and operated for the purpose of promoting thrift, providing credit at competitive rates, and providing other financial services to its members...

' are subject to corporations meeting a certain criteria.