Overview

Amazon Error 100423 is a listing contribution error that sellers may encounter when updating product information through feed files. This error occurs when a product modification would cause new compliance or regulatory policies to be attached to a listing during Amazon's reconciliation process. When triggered, Amazon suppresses the contribution to prevent unintended policy changes from taking effect.

Key Points / What Sellers Need to Know

• Contribution suppression — When this error fires, your product update is not applied. Amazon blocks the change to prevent new policies from being attached to the listing without proper review.
• Policy reconciliation trigger — The error is tied to Amazon's internal reconciliation system, which checks whether product modifications would introduce new regulatory or compliance requirements.
• Feed file submissions affected — This error typically surfaces when sellers submit bulk updates through feed files rather than through manual listing edits in Seller Central.
• No immediate listing damage — Because the contribution is suppressed, your existing listing remains unchanged. The error is protective rather than destructive.
• Resolution requires review — Sellers need to examine their updates and align modifications with the store's existing policy framework before resubmitting.

Why This Error Occurs

Error 100423 is triggered during the reconciliation phase of a product update when Amazon's system detects that the changes you submitted would result in new policies being attached to the listing. There are several specific scenarios that cause this. First, your updates may introduce new policy requirements that were not previously associated with the product — for example, changing a product attribute that moves it into a regulated category. Second, Amazon's system may detect policy conflicts during reconciliation, meaning your changes create inconsistencies with the compliance framework already in place. Third, your modifications may directly affect regulatory or compliance requirements, such as altering ingredient lists, safety certifications, or product classifications that fall under specific Amazon policies.