39 U.S.C. § 3003 - U.S. Code - Unannotated Title 39. Postal Service § 3003. Mail bearing a fictitious name or address

(a) Upon evidence satisfactory to the Postal Service that any person is using a fictitious, false, or assumed name, title, or address in conducting, promoting, or carrying on or assisting therein, by means of the postal services of the United States, an activity in violation of sections 1302, 1341, and 1342 of title 18, it may--

(b) The Postal Service may issue an order directing that mail, covered by subsection (a) of this section, be forwarded to a dead letter office as fictitious matter, or be returned to the sender when--