A payment plan agreement outlines an installment plan to repay an outstanding balance over a specified time frame. Create a Loan Payoff Letter online and download it as a PDF or Word document.Customize and print a blank Loan Payoff Letter for free. Creating a payoff letter is essential to any loan or mortgage repayment process. Our free templates and this guide can help you get started. A personal loan agreement is a contract between two parties, generally a borrower and a lender. It outlines how much is borrowed, how it's repaid and more. If interest is charged, the rate should be included with a repayment schedule. It is common for lenders to request "security" for the loan (such as a vehicle). Credit cards are not legally considered written contracts in Illinois.