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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).

Scroll below for more information regarding the CSMS Transition.

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.

Looking for an older message? Click here to access the 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.

Transition Updates


Created in the 1990s, the Cargo Systems Messaging Service, or CSMS, was developed by CBP to provide timely service messages to automated cargo systems users as well as courtesy messages on related trade processing information. Recently, due to the aging technology currently in use, the CSMS messaging service has become increasingly unstable and poses a risk to CBP’s ability to send timely messaging on issues affecting the systems users. After looking into several options for modernizing the technology, CBP’s Trade Transformation Office identified a solution that will ensure dependable service. The new technology platform will provide additional benefits, such as the elimination of duplicative messages, improved messaging formats, the ability to embed hyperlinks into messages, etc. CBP will transition to this new technology for issuing CSMS messages on July 1, 2019. Overall impacts to end users will be minimal. Here’s what you need to know about the transition:

Do I need to re-subscribe and will I receive a message for each subscription group?

No. Current recipients of CSMS messages will not be required to re-subscribe as part of this transition; all existing subscriptions will be maintained.

As you know, under the current CSMS platform, subscribing to multiple groups means that users receive multiple messages. With the updated platform, users will only receive one version of the message, regardless of how many groups to which they may be subscribed.

Will the legacy CSMS page be shut down?

The legacy CSMS webpage will continue to be updated through June 30, 2019. After that time, all new messages will be found through the new CSMS webpage. The legacy CSMS webpage will remain available for reference until September 30, 2019. On October 1, 2019, the legacy CSMS webpage will be shut down and access to the CSMS archive will only be available through the new CSMS webpage.

More information regarding how to access the archives can be found in the new CSMS Page information sheet.

Will CSMS messages continue to be numbered?

Yes. Although the sequencing will be different under the new platform, CSMS messages will continue to be labeled with an associated number to assist with referencing and identification of messages.

What if I’m currently receiving SMS (text) messages?
As part of this transition, we will discontinue the use of SMS messaging to phone numbers. Please make sure you are signed up to receive all updates via email.

Be sure to visit this page and look out for additional CSMS messages for the latest information on the CSMS transition.





Last modified: 
February 28, 2020