Members receiving overpayment letters must respond promptly, as they are given four weeks to do so. You can also reach out to our Phoenix team through the Contact Us form and select the option "Phoenix – Overpayments.Make sure to fill out Annex B in your overpayment letter within the deadline provided even if you file a grievance. These FAQs outline how to respond to an overpayment letter and provide guidance on next steps. How do I appeal an overpayment? You request they provide you with a reconciliation of your pay file to demonstrate you have been overpaid the amount at issue. Overpayments happen for various reasons. For example, DES may not budget your correct income or resources.