You don't need an attorney to write a Washington promissory letter. Simply download the relevant form and fill out the required information.Are you looking for a loan agreement form in Washington? Download our free Washington Loan Agreement Form which is available as PDF or Word documents. Step 1 – Download the template. Grant of Security Interest. Debtor grants a security interest in the Collateral to Secured Party to secure the payment and performance of the Obligations. 3. Download Washington Personal Loan Agreement template, modify and send for signing using BoloForms Signature. It specifies the loan amount, interest rate, repayment schedule, and any collateral securing the loan. To request a payoff quote, please complete the payoff quote form.