Tips on How to Resolve AES Response Messages

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November 18, 2021

Tips on How to Resolve AES Response Messages

Fatal Error Screen - Large

When a shipment is filed to the AES, a system response message is generated and indicates whether the shipment has been accepted or rejected.  If the shipment is accepted, the AES filer receives an Internal Transaction Number (ITN) as confirmation.  Though the shipment is accepted, the filer may still receive a Verify Message, Compliance Alert, Informational Message or Warning Message along with their ITN.  However, if the shipment is rejected, a Fatal Error notification is received and must be corrected to receive a valid ITN. 

To help you take the appropriate action for the different AES Response Messages, here are some tips on how to address the most frequent messages that were generated in AES for this month.

Response Code: 123

Narrative:     Conveyance Name Missing

Severity:       Fatal

Reason:        The Conveyance Name/Carrier Name is missing when the Mode of Transportation is one that requires the Conveyance Name/Carrier Name to be reported.

Resolution:  The name of the transport conveyance must be reported on an EEI for the major modes of transportation (i.e., vessel, air, rail, truck).  For Vessel shipments, report the name of the vessel; for Air, Rail, or Truck shipments report the carrier name.   

Verify the Mode of Transportation and the Conveyance Name/Carrier Name, correct the shipment and resubmit.    

Fatal Error Response Code:  539

Narrative:     Shipping Weight Must be Zero for MOT

Reason:         The Mode of Transportation Code is not Vessel, Rail, Truck or Air and the Shipping Weight is not reported as zeros.

Resolution:  When the Mode of Transportation is other than Vessel, Rail, Truck or Air and the Export Information Code is not HH for household goods, the Shipping Weight must be zero.

Verify the Mode of Transportation and Shipping Weight, correct the shipment and resubmit.

AES Training Resources


For a complete list of Fatal Error Response Codes, their reasons, and resolutions, see Appendix A – Commodity Filing Response Messages.

It is important that AES filers correct Fatal Errors as soon as they are received in order to comply with the Foreign Trade Regulations. These errors must be corrected prior to export for shipments filed predeparture and as soon as possible for shipments filed postdeparture but not later than five calendar days after departure.

For further information or questions, contact the U.S. Census Bureau's Trade Data Collection Branch.

Telephone: (800) 549-0595, select option 1 for AES

Email: askaes@census.gov

Online: www.census.gov/trade

Blog: blogs.census.gov/globalreach

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