Label error — UPS — Harmonized system code is not defined

UPS label error caused by a missing HS code on one or more products. Learn how to add the required customs classification in the product catalog.

1 min readUpdated Oct 1, 2026

This error occurs when UPS cannot generate a label because one or more products are missing a valid HS code.

Error message

"Validation Error: Harmonized system code is not defined"

What this means

UPS requires an HS code for international shipments. One or more products are missing customs classification information.

How to fix it

  1. Open the product catalog.
  2. Add a valid HS code to the affected product.
  3. Save the changes.
  4. Regenerate the label.

If the issue continues

Contact support with the RMA ID, the affected product name, and a screenshot of the error.