Restricted delivery

§ 5009. Restricted delivery (a) The Postmaster General may provide for domestic registered, insured, and collect-on-delivery and other mail accorded special services to be restricted in delivery to the addressee only, or to the addressee or order. He shall charge an additional fee for this service. (b) The Postmaster General may refund fees paid for this service only upon request and when the postal service is at fault for the erroneous delivery or the nondelivery of the article.