Insurance adjuster name. Insurance claim number.Subrogation claims are made up of economic damages, such as medical expenses and wage loss. "Subrogation" refers to the act of one person or party standing in the place of another person or party. The Michigan No-Fault Act essentially grants tort immunity to anyone who has No-Fault insurance. How to File a Complaint With DIFS. You have no legal obligations to respond to a subrogation letter. Subrogation is a way for your insurer to seek repayment for the money it paid to you from the atfault party's insurance company. The Plaintiff, above named, complaining of Defendants, above named, alleges and says as follows: 1. It states that a subrogated insurance company standing in the shoes of its insured cannot bring a subrogation action against or sue its own insured.