Source: https://bitlaw.com/source/mpep/2510.html
Timestamp: 2019-04-19 10:35:12+00:00

Document:
A listing of available payment options and current mailing addresses is available on the USPTO website at www.uspto.gov/PatentMaintenanceFees.
Maintenance fee payments can be made quickly and easily over the Internet at www.uspto.gov by electronic funds transfer (EFT), credit card or deposit account payment methods. Maintenance fee payments cannot be submitted by using EFS-Web. Maintenance fees paid online are through the Patent Maintenance Fees Storefront (https://fees.uspto.gov/MaintenanceFees ). See MPEP § 509 and § 25.2 for additional information pertaining to payments by credit card and payments by deposit account. Payment receipts for all payments submitted over the Internet are available immediately in the Patent Maintenance Fees Storefront after the payment is processed. Receipts for bulk file payments of maintenance fees will include a listing of accepted payments for each patent maintained in force as well as a listing of any payments that could not be accepted with an explanation why. Note that the bulk file payment option can only be done online using the Patent Maintenance Fees Storefront.
37 CFR 1.366(b) provides that the certificate of mailing procedures of 37 CFR 1.8 or the mailing by Priority Mail Express® provisions of 37 CFR 1.10 may be utilized in paying maintenance fees. The specific requirements of either 37 CFR 1.8 or 1.10 must be fully complied with if the benefits of either are desired. See MPEP § 512 and § 5.3.
Payment of a maintenance fee is accepted via facsimile to the fax number stated on the Maintenance Fee Transmittal Form (SB/45), when charged to a deposit account or to a credit card. Credit Card Payment Form (PTO-2038) should be used if payment is made by credit card. See MPEP § 509 and § 25.2. In addition, requests pertaining to post-issuance documents, such as change of correspondence address, assignment of fee address, etc., may be submitted by facsimile.
37 CFR 1.366(b) provides that the certificate of transmission procedure of 37 CFR 1.8 may be utilized in paying maintenance fees. The specific requirements of 37 CFR 1.8 must be fully complied with if the benefits thereof are desired. See MPEP § 512.
Maintenance fee payments may be hand-carried to the Office of Finance receptionist in Suite 300 of the Carlyle Place Building, 2051 Jamieson Avenue, Alexandria, VA 22314. Although the receptionist will not process the maintenance fee payment, if the payment is delivered with an itemized postcard, the receptionist will provide a delivery receipt by date stamping the postcard. The maintenance fee payment should be placed in an envelope with MAINTENANCE FEE written in dark ink across the envelope.

References: § 509
 § 25
 § 512
 § 5
 § 509
 § 25
 § 512