A treasurer is the person responsible for running the treasury of an organization. The significant core functions of a corporate treasurer include cash and liquidity management, risk management, and corporate finance. 
The treasury of a country is the department responsible for the country's economy, finance and revenue. The treasurer is generally the head of the treasury, although, in some countries (such as the United Kingdom or the United States) the treasury reports to a Secretary of the Treasury or Chancellor of the Exchequer.
In Australia, the Treasurer is a senior minister and usually the second or third most important member of the government after the Prime Minister and Deputy Prime Minister. Each Australian state and self-governing territory also has its own treasurer.
From 1867 to 1993, Ontario's Minister of Finance was called the Treasurer of Ontario.
Originally the word referred to the person in charge of the treasure of a noble; however, it has now moved into wider use. In England during the 17th century, a position of Lord High Treasurer was used on several occasions as the third great officer of the Crown. Now the title First Lord of the Treasury is the official title of the British Prime Minister.
This title is similarly used by other legal associations sharing a British heritage, such as the Law Society of Upper Canada.
Many volunteer organizations, particularly not-for-profit organizations such as charities and theaters, appoint treasurers who are responsible for conservation of the treasury, whether this be through pricing of a product, organizing sponsorship, or arranging fundraising events.
The treasurer would also be part of the group which would oversee how the money is spent, either directly dictating expenditure or authorizing it as required. It is their responsibility to ensure that the organization has enough money to carry out their stated aims and objectives, and that they do not overspend, or under spend. They also report to the board meetings and/or to the general membership the financial status of the organization to ensure checks and balances.  Accurate records and supporting documentation must be kept to a reasonable level of detail that provides a clear audit trail for all transactions. 
- Certified Treasury Professional
- Chief financial officer
- Auditor general
- Treasury management
- Degenhart, Dr. Heinrich. "The Functions of a Corporate Treasury". www.treasury-management.com. Retrieved 2018-04-05.
- Robert, Henry M.; et al. (2011). Robert's Rules of Order Newly Revised (11th ed.). Philadelphia, PA: Da Capo Press. pp. 461, 477–480. ISBN 978-0-306-82020-5.
- Robert III, Henry M.; et al. (2011). Robert's Rules of Order Newly Revised In Brief (2nd ed.). Philadelphia, PA: Da Capo Press. pp. 153–155. ISBN 978-0-306-82019-9.
- National Association of Parliamentarians®, Education Committee (1993). Spotlight on You the Treasurer. Independence, MO: National Association of Parliamentarians®. ISBN 1-884048-26-9.
- Treasury Management International, The Functions of a Corporate Treasury, Dr Heinrich Degenhart, Verband Deutscher Treasurer e.V.
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- O*NET-SOC 11-3031.01 ~ Treasurers and Controllers
- U.S. Department of Labor SOC 11-3031 ~ Financial Managers
- Association of Public Treasurers of the United States and Canada (APTUSC)
- California Municipal Treasurers Association (CMTA)
- Oklahoma Municipal Treasurers' Association (OKMTA)
- Government Treasurers' Organization of Texas (GTOT)
- Virginia Treasurers' Association (TAV)