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. Gather complete information before you start writing. Injured due to the negligence of another party in Miami, FL? Includes sender and recipient details, dispute description, settlement demand, deadline, and governing law. What is a letter of intent to sue a civil action? To find case law you will need to visit a law library. Note on Rules of Court Procedure: Different case types have different rules of procedure. I want to sue a Florida municipality.