A participant shall promptly: Notify the Agency in writing of: Any change of the participant’s name, address, or telephone number; or The death of the alternate payee; Comply with all reasonable requests from the Agency for information and documentation necessary for processing payment of all or any portion of a participant's plan benefit to the alternate payee; and Submit any applications or forms required by the Agency to effectuate any provision of the domestic relations order. If the participant takes any action in contravention of an eligible domestic relations order, the participant, and not the Agency, shall bear the sole and exclusive liability for the action.