This article applies to selling in: United States

Error 18021

Unacceptable quantity specified for this order. For reasons why, and help fixing this, see http://sellercentral.amazon.com/gp/help/25341

This error occurs when the Quantity value in your tab-delimited shipping confirmation file or order fulfillment feed (XML) is incorrect. Common reasons why this might be the case include the following:

  • The Quantity value is a negative number.
  • The Quantity value exceeds the number of ordered items
  • The Quantity value exceeds the number or ordered items minus any items for which shipment was previously confirmed.

To resolve this error, please provide a positive Quantity value that equals the number of shipped items you have not previously confirmed.

You should not confirm shipment of the same items multiple times. Amazon.com considers all shipping confirmation or fulfillment data to be in addition to data previously provided. If your shipping confirmation file or order fulfillment feed contained errors, first remove the data for any records that did not contain errors before submitting your modified data a second time.

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