Treasurer's checks are a secure form of payment that is issued by a financial institution on behalf of an individual or organization. Also known as cashier's checks, these checks are considered a reliable payment method for large amounts of money. Some synonyms for treasurer's checks include bank drafts, certified checks, and money orders. These payment methods are all similarly secure and involve the bank or post office guaranteeing payment. It is important to note that while treasurer's checks are a safe way to pay, they may come with fees and restrictions, so it is important to understand the terms and conditions of their use.