Washington Acknowledgement of Security Interest (WAS) is a document used in Washington State to create a security interest in personal property. It is used to secure a debt or a loan agreement and is typically used in a transaction where collateral is being provided. WAS is a part of the Uniform Commercial Code and can be used to protect lenders in the event of default. There are different types of Washington Acknowledgement of Security Interest, depending on the type of loan agreement. These include: WAS for consumer transactions, WAS for business transactions, WAS for motor vehicle transactions, WAS for farm product transactions, and WAS for real estate transactions. All Basis must be recorded with the county auditor in order to be valid.