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Trade Document Reference Library

Letter of Intent

The Letter of Intent (LOI) is a written application to participate in the AES.

  • If you plan to file via another method other than ACE AESDirect, complete the Letter of Intent Form (LOI) to apply for AES filer certification.

Parameter Change Request

For filers that frequently receive AES Verify messages, you may submit a Parameter Change Request to EID.parameterchange@census.gov. In order to submit your request, your company must use the Parameter Change Request Form.

The Parameter Change Request requires the following information:

  • at least five Internal Transaction Numbers (ITNs) of shipments
    • filed within the same month
    • with the same Schedule B/HTS Number
    • that generated the same verify message

Once your request is received, the Economic Indicators Division's Micro-Analysis Branch will investigate your request, make a ruling, and respond directly to the submitting party. If you have any questions, please email EID.parameterchange@census.gov



AES Newsletters

Note: All newsletters are in Adobe Acrobat files (PDF). If you have problems reading any files, upgrade your Acrobat reader free of charge from the Adobe web site. Should you continue to have problems, please let us know.

2022 Trade Source

2021 Trade Source

2020 Trade Source

2019 Trade Source

  • July 2019
  • February 2019 (Note: as a result of the Federal Government partial shutdown, the newsletter was not published in January as in prior years)

2018 Trade Source

2017 Trade Source

2016 Trade Source

2015 Trade Source

Newsletter Archive

  • Newsletters from 2002 through 2014


Get email updates

Broadcast Archive

Broadcasts from 2015 through 2022 can be found in the Broadcast Archive.

AES Concordance (Commodity Classification Files)

2022 Concordance Files Available for Use

These files contain valid commodity classification codes for use while filing export shipments through the Automated Export System (AES).

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Source: U.S. Census Bureau | Source:International Trade Management Division | ftdwebmaster@census.gov |  Last Revised: November 07, 2023