A treasurer's check is also called a cashier's check, bank check, or official check. These terms refer to a type of check that is issued by a bank or credit union from their own funds, guaranteeing payment to the recipient. A treasurer's check is usually requested for large purchases, real estate transactions, and other important financial matters. Some other terms that can be used interchangeably with treasurer's check include certified check, guaranteed check, and money order. Regardless of the terminology used, a treasurer's check provides a reliable and secure method of payment, ensuring that the recipient will receive their funds without the risk of a bounced check or insufficient funds.