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. A letter of intent to sue (with settlement demand) notifies an individual that the sender intends to file a lawsuit against them.Write an effective intent to sue letter. Name (of petitioner or attorney). "Craft your Small Claims Demand Letter efficiently using our guide. Learn how to prepare for a small claims case and assert your legal rights effectively." Includes sender and recipient details, dispute description, settlement demand, deadline, and governing law. What is a letter of intent to sue a civil action?