• A waiver agreement is an agreement by the injured party not to sue the party that caused the damage. It is different from exemption from liability. An exemption is a renunciation or renunciation of a known right. A release from liability will waive or destroy the injured party’s claim. On the other hand, an agreement not to sue is not a waiver of a known right; nothing is left or destroyed. An agreement not to sue thus preserves the existence of a cause of action, but imposes contractual restrictions on the right of the injured party to sue. The injured party cannot assign a cause of action after it has been released. However, the aggrieved party may designate a cause of action, which is simply contingent on the aggrieved party’s agreement not to sue, after which the assignee may sue. Under the laws of some states, an insured who releases the tortfeasor from liability may be considered to have violated the insurer’s right to subrogation. If the policyholder simply enters into a non-claim obligation under which the cause of the policyholder’s claim against the tortfeasor still exists and can be transferred to the insurer, who can bring a claim on its own, the policyholder may be considered to have retained the insurer’s right to subrogation.