Error 300403 — Marketplace-specific errors

A marketplace-specific rule failed — applies to listings on specific Amazon regions (US, UK, DE, JP, etc.).

Specific to error 300403: see Amazon's processing report for the exact field or attribute that failed validation. The 300000-series typically covers marketplace-specific errors — review Amazon's official docs for code-specific guidance.

1. Confirm which marketplace the error applies to.
2. Consult that marketplace's category and seller help docs for the specific rule.
3. Update the listing and resubmit per-marketplace if needed.
4. Open Amazon's official explanation for this code via the link below for the most authoritative guidance.

• Generic feed templates often miss category-specific required attributes
• Stale schema versions trigger validation errors that newer schemas don't