We've put together some of the most common questions about your auto insurance claims. Learn about what goes into a settlement demand letter and how to avoid common mistakes from Sweeney Merrigan Personal Injury Lawyers.It outlines the details of the accident, injuries sustained, medical treatments received, and associated costs. After a brief introduction, you start with the facts of your case. Complete the Appeal Form located on the reverse side of the Notice of At-Fault Accident Determination. Sample of a Cash Settlement Letter. What Damages Can You Recover After a Car Accident? A letter from your employer to verify that you missed work because of your injuries. Your letter should include a concise factual summary of the accident, an overview of your damages, your settlement demand, and not much more. Most car accident cases between the injured party and an insurance company settle out of court.