Filing a Claim Against the City. To pursue a claim, use the Claims Form below and follow the instructions on the form.Fax your case referral information to us at 844-634-2520. Mail your case referral information to us at: Carelon Subrogation PO Box 659940. Subrogation clients are offered closed file reviews free of charge, and in-house seminars upon request, also at no charge. Auto insurance subrogation is a process where your insurance company compensates you first, then seeks reimbursement from the at-fault party to an accident. Our attorneys have successfully handled subrogation claims for a variety of insurers, both international and domestic, both pre-suit and in litigation. Cozen O'Connor is the world's leading subrogation and recovery law firm. We founded our subrogation and recovery practice in 1970. Subrogation is a legal term that refers to the right of an insurance company to pursue reimbursement for money it has paid out for a claim.