7 CFR §1951.13

1. (a)The Finance Office will mail any overpayment refund check to the County Supervisor, who will verify that the refund is due before delivering the check.
2. (b)Borrower requests for overpayment refunds must be in writing. Borrowers will be discouraged from requesting refunds when the County Office records show that a refund is not due, however, the County Supervisor will forward any request to the Finance Office. Finance Office computations will control in determining the amount of any refund.
3. (c)Underpayments or overpayments of less than $10 will not be collected or refunded (except as provided in paragraph (b) of this section) since the expense of processing the action would be more than the amount involved.