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ACE Cargo Release Status Notification Implementation Guide

Document Posting Date: 
April 19, 2021

Production Date: March 20, 2021

An updated ACE Cargo Release SO Status Notification Guide is now available on

This page provides the message formats and technical specifications necessary to electronically transmit data to CBP's automated systems. This document may qualify as a “guidance document” as set forth in Executive Order 13891 and interpretations thereof; such guidance documents are not binding and lack the force and effect of law, except as authorized by law or as incorporated into a contract. This document is being posted to this portal to provide stakeholders with useful information.


Last modified: 
May 3, 2021