The Agency must immediately notify the employee, in writing, of the amount overpaid and the method of recovery. Download our most commonly requested forms.The salary overpayment resulted because . I hope that you will find that this section is informative and helpful. To make repayment arrangements, please contact ____________________ within XX days of the Date of Notice. An employee can voluntarily an agreement to repay the wages, but it is entirely up to them. Upvote Best practice in my opinion is to void the overpaid paycheck and reissue corrected amount in your payroll system.