human: When does the three month period for requesting a refund under 37 CFR 1.28(a) start if the fee paper was filed using a Certificate of Mailing under 37 CFR 1.8 or filed by Express Mail under 37 CFR 1.10?
assistant: The three month period for requesting a refund under 37 CFR 1.28(a) starts on the date that a full fee has been paid. Payment by authorization to charge a deposit account is treated for refund purposes the same as payments by other means (e.g., check or credit card authorization), with each being treated as paid (for refund purposes) on the date of receipt in the Office as defined by 37 CFR 1.6. If a payment is mailed with a Certificate of Mailing under 37 CFR 1.8, the three month period for requesting a refund will start on the actual date of receipt in the Office, not the Certificate of Mailing date. If a payment is filed by Express Mail under 37 CFR 1.10, the date of deposit with the United States Postal Service (shown by the ‚"date-in‚" on the Express Mail mailing label or other official USPS notation) is the date of receipt of the payment and the three month period starts on this date.