Subrogation simply means the insurance company recovering what it paid due to another party's conduct. Like any legal document, the subrogation letter can be confusing if you aren't familiar with the term or the process.Click here to learn more about it! You have no legal obligations to respond to a subrogation letter. Customer: Hello, I recently received a subrogation claim in the mail for a car wreck I was at fault in last year. They say I owe 19,654.40. Subrogation means your insurance company can recover the money it paid to you for your injury from the at-fault party that caused your injury. The tone of a Subrogation Letter should be professional, firm, and clear, but not overly aggressive. California law states your insurance company must file a subrogation claim within three years of the accident that caused your injuries. Once you have the right Answer form, you'll write in it what might be not true in the Complaint and what defenses that you might raise.