Per 8 USC 1304 “(d) Certificate of alien registration or alien receipt card
“Every alien in the United States who has been registered and fingerprinted under the provisions of the Alien Registration Act, 1940, or under the provisions of this chapter shall be issued a certificate of alien registration or an alien registration receipt card in such form and manner and at such time as shall be prescribed under regulations issued by the Attorney General.”
see also:
Per 8 U.S.C. § 1302, all aliens in the United States for 30 days or longer are required to register with the U.S. Gov’t, and § 1304(e) requires they “at all times carry with [them] and have in [their] personal possession any [proof of] alien registration [] issued”.
