Overview

Error 18033 is a feed processing error that Amazon sellers encounter when submitting an order acknowledgement feed with an invalid StatusCode value. This error blocks the feed from processing, which can delay order confirmation and disrupt fulfillment workflows. Sellers who use feed-based integrations — whether through custom systems, third-party tools, or the SP-API — need to understand the correct StatusCode values to keep their order pipelines running smoothly.

Key Points / What Sellers Need to Know

• StatusCode is required in order acknowledgement feeds — Every order acknowledgement submission must include a valid StatusCode value to tell Amazon whether the order was successfully imported into your system.
• Only two values are accepted — The StatusCode field accepts either "Success" (order successfully imported) or "Failure" (order could not be imported). Any other value triggers Error 18033.
• A Failure status triggers immediate cancellation — When you submit a StatusCode of "Failure" for an order, Amazon will immediately cancel that order and issue a full refund to the customer.
• Do not use Failure for inventory shortages — If you cannot fulfill an order due to inventory issues, submitting a Failure StatusCode is the wrong approach. Instead, you should submit an order adjustment feed with a valid AdjustmentReason.
• Resubmission is the fix — To resolve this error, correct the StatusCode value in your feed file and resubmit the order acknowledgement feed.

How Order Acknowledgement Feeds Work

Order acknowledgement feeds are the mechanism sellers use to confirm to Amazon that incoming orders have been received and imported into their fulfillment systems. When Amazon sends order data to a seller's system, the seller responds with an acknowledgement feed that includes a StatusCode for each order. This StatusCode tells Amazon whether the seller's system was able to accept and process the order. The feed acts as a handshake between Amazon's marketplace and the seller's backend, ensuring both sides are aligned on order status before fulfillment proceeds.

Common Causes of Error 18033