You can also reach out to our Phoenix team through the Contact Us form and select the option "Phoenix – Overpayments. These FAQs outline how to respond to an overpayment letter and provide guidance on next steps.Make sure to fill out Annex B in your overpayment letter within the deadline provided even if you file a grievance. Highlight any that occurred more than six years before the date stated at the top of the letter. You request they provide you with a reconciliation of your pay file to demonstrate you have been overpaid the amount at issue. How do I appeal an overpayment?