If an insurance company filed a subrogation claim for property damage against you, a skilled property damage attorney could can help you. A Subrogation Letter should clearly state the facts of the case, including details of the incident (e.g.When there is a waiver of subrogation, it means that everybody is responsible for replacing their own damage; their own property that's damaged. Proof of Loss Claim. 1. Complete the official NFIP Proof of Loss form, which we have included. 2. What is subrogation? Why am I being asked to waive it? Our under-deductible subrogation services can help insurance customers pursue reimbursement for damages that fall below the deductible. Our firm assists clients dealing with issues related to car accidents, medical malpractice, premises liability, personal injury, and municipal liability.