An Oregon Irrevocable Standby Letter of Credit is a legal document that is used to guarantee payment of a debt or obligation. It is an instrument issued by a bank, and is typically used in business transactions as an assurance to a third party that the issuer will fulfill the financial obligation. It is generally accepted as a guarantee of payment for performance or supply of goods and services. There are three different types of Oregon Irrevocable Standby Letters of Credit: Financial, Performance, and Supplier. A Financial Irrevocable Standby Letter of Credit is used to guarantee payment of a debt or obligation, and is often used in international trade. A Performance Irrevocable Standby Letter of Credit is used to provide assurance of performance of a contract or transaction, and is typically used in construction projects. A Supplier Irrevocable Standby Letter of Credit is used to guarantee payment for goods or services, and is often used in commercial transactions.