In any case coming under the provisions of this paragraph, the evidence referred to above must be submitted to the Bureau of the Fiscal Service, Division of Transactions and Rulings, Parkersburg, WV 26101, for approval before any bonds may be paid. If, after review of the evidence, the Secretary of the Treasury is satisfied that the owner's disability has been established, a letter will be furnished authorizing payment of his Retirement Plan Bonds. This letter must be presented each time any of the owner's bonds are submitted for payment to a Federal Reserve Bank or Branch or to the Bureau of the Fiscal Service.
31 C.F.R. §341.8