Download a letter of intent to sue (with settlement demand) to inform a defendant that you will sue if they don't pay a settlement amount. Write an effective intent to sue letter.Includes sender and recipient details, dispute description, settlement demand, deadline, and governing law. What is a letter of intent to sue a civil action? A letter of intent to sue (with settlement demand) notifies an individual that the sender intends to file a lawsuit against them. A letter of intent to sue is used to provide notice to an individual or entity that a lawsuit may be filed against them if certain demands are not met. Write an effective settlement demand letter. Get tips on structure, key elements, and a free template to negotiate your legal disputes. This page focuses on how to write an effective settlement demand letter to the insurance company in an auto accident case to maximize your settlement amount. Various free letters of intent to sue templates are available online, which can be tailored to make your case assertive.