Carelon Subrogation PO Box 659940. San Antonio, TX 78265-9939.To pursue a claim, use the Claims Form below and follow the instructions on the form. A Subrogation Letter should clearly state the facts of the case, including details of the incident (e.g. Auto insurance subrogation is a process where your insurance company compensates you first, then seeks reimbursement from the at-fault party to an accident. Trustee's Address — Enter the trustee's complete mailing address. Your insurance company will send the letter requesting details about the accident and your injuries. You have no legal obligations to respond to a subrogation letter. Subrogation is a common process in which your insurance company gives you money for your damages upfront, then goes up against the defendant for reimbursement. Fill out this form and we'll get back to you shortly.