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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 use the free Internet export reporting system,, or one of its products, you do not need to complete an LOI. Instead you just need to register an AESDirect filing account.
  • If you do not plan to use or one of its products, you must complete an LOI. [external link]

Parameter Change Request

For filers that frequently receive AES Verify messages, you may submit a Parameter Change Request to 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 Commodity Analysis Branch will investigate your request, make a ruling, and respond directly to the submitting party. If you have any questions, please email



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.

2015 Trade Source

2014 Trade Source

Newsletter Archive

  • Newsletters from 2002 through 2013


Get email updates

Broadcast Archive

Broadcasts from 2003 through 2013 can be found in the Broadcast Archive.

AES Concordance (Commodity Classification Files)

2015 Concordance Files Available for Use

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

Please address any questions about these new files through our FEEDBACK page or e-mail

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Source: U.S. Census Bureau | Source:International Trade Management Division | |  Last Revised: September 10, 2015