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Cargo Systems Messaging Service

Welcome to U.S. Customs and Border Protection’s (CBP’s) Cargo Systems Messaging Service (CSMS). CSMS is one of CBP’s methods for communicating to our trade partners news and updates on our automated systems – namely the Automated Commercial Environment (ACE).

To search for a message title or number on this page, use the find function. Press CTRL + F and start typing your keywords. A search bar will appear at the top of the screen displaying your search terms. This will search message titles on the entire page.


To access the CSMS archive (2011-present), please use the following link:

CSMS Archive

Once open, use the CTRL + F function to key word search for the message title or CSMS number, and then click on the message title to view the message.

Last modified: 
September 1, 2020