Skip to main content

An official website of the United States government

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

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. Newsroom
  3. Documents Library

Documents Library

The Documents Library contains forms, guidance, reports, regulations, factsheets and more. Enter search terms below to search the library.

Documents

    • Cargo Manifest / In-Bond / Entry Status Query | Guidance

      This page provides the message formats and technical specifications necessary to electronically transmit data to CBP's automated systems. This document is being posted to this portal to provide stakeholders with useful information.

    • ACE Cargo Release SO Status v40 | Guidance

      This page provides the message formats and technical specifications necessary to electronically transmit data to CBP's automated systems. This document is being posted to this portal to provide stakeholders with useful information.

    • Daily Foreign Currency Exchange Rate Multipliers | Report

      Daily Foreign Currency Exchange Rate Multipliers are provided in Excel and PDF format. Note: For the official list of countries that are currently using the Euro (EUR), please go to the European Union's website.

    • Waterborne Barrier Construction - Cameron County, Texas - July 2025 | Environmental Assessments

      CBP is planning to construct approximately 17.6 miles of waterborne barrier in Cameron County, Texas. Consistent with section 102(b)(1)(C) of the Illegal Immigration Reform and Immigrant Responsibility Act (IIRIRA) of 1996, as amended, 8 U.S.C. § 1103 note, CBP seeks input on the project’s potential...

    • CSMS Archive | Guidance

      CSMS Archive (2011-present). Once the file is 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.

    • Construcción de Barreras Acuática – Condado de Cameron, Texas – Julio de 2025 | Environmental Assessments

      CBP planea construir aproximadamente 17.6 millas de barrera acuática en el condado de Cameron, Texas. De conformidad con la sección 102(b)(1)(C) de la Ley de Reforma de la Inmigración Ilegal y Responsabilidad del Inmigrante (IIRIRA) de 1996, en su versión modificada, 8 U.S.C. § 1103 nota, CBP busca...

    • ACE CATAIR Reconciliation Error Dictionary | Guidance

      Reference table of error codes that may be received through electronic transmission of ACE reconciliation records. This page provides the message formats and technical specifications necessary to electronically transmit data to CBP's automated systems.

    • ACE Summary of Changes to AESTIR | Guidance

      This page provides the message formats and technical specifications necessary to electronically transmit data to CBP's automated systems.