How do I fill out the Options page (Annex B) in my overpayment letter? These FAQs outline how to respond to an overpayment letter and provide guidance on next steps.Please be sure to check your collective agreement for the applicable timelines. Make sure to fill out Annex B in your overpayment letter within the deadline provided even if you file a grievance. If you say "I do not owe you any money", then it does not. This page provides information about overpayments and the new flexible repayment options available to you. Just call 555-5555 and our customer service representative will honor your request.