U.S. flag

An official website of the United States government

Government Website

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Safely connect using HTTPS

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


  1. Home
  2. News
  3. Publication Library
  4. DHS/ICE/PIA-023 Significant Event Notification System

DHS/ICE/PIA-023 Significant Event Notification System


The Significant Event Notification system (SEN) is a reporting and law enforcement intelligence transmission capability developed by U.S. Immigration and Customs Enforcement (ICE), a component of the U.S. Department of Homeland Security (DHS). The ICE Office of Homeland Security Investigations (HSI) developed this system to create reports for ICE field and headquarters managers to provide timely information about critical incidents, activities, and events that involve or impact ICE field staff. The system also handles law enforcement intelligence communication from the ICE Office of Enforcement and Removal Operations (ERO) field offices to field and headquarters managers and ERO and HSI intelligence personnel. The original SEN PIA was published in 2010. ICE is updating this PIA to reflect the current configuration of the program and to accurately document that SEN accesses and stores personally identifiable information (PII) gathered in the course of official ICE investigations or other law enforcement activities. October 2021

Associated SORNs

Attachment Ext. Size Date
DHS/ICE/PIA-023(a) Significant Event Notification (SEN) System - October 2021 PDF 427.42 KB 10/15/2021
Significant Event Notification System (SENS) July 26, 2010 PDF 236.06 KB
Last Updated: 03/31/2023
Was this page helpful?
This page was not helpful because the content