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CSMS #15-000108
  Title: NAFTA Certificate of Origin Enhancements and Use of Expired Certifications
  Date: 2/18/2015 4:53:19 PM
  To: Automated Broker Interface, ACE Portal Accounts
An amended CBP Form 434, NAFTA Certificate of Origin, now available on the CBP “Forms” page 
at, provides blocks for importer / exporter / producer and signee email addresses, as well as drop-down calendars indicating “mm/dd/yy” for the input of the blanket period and signature date.  These enhancements to the CBP Form 434 were made to facilitate communication and eliminate date ambiguity.

CBP will continue to accept prior versions of the CBP 434, as well as the Canadian B232 and the Mexican Certificado de Origen without the email address blocks. While a form with email blocks may assist communication, for CBP purposes, a form or format without email addresses remains valid.

CBP forms obtained from the “Forms” menu of are the most up-to-date available. CBP will continue to accept certificates of origin associated with the NAFTA (CBP Form 434), the Caribbean Basin Trade Partnership Act (CBP Form 450) and the Insular Possessions (CBP Form 3229) irrespective of any expiration date.

If you have questions, please contact the Trade Agreements Branch at