How to Fix Error 100429: Contribution Blocked by Marketplace or Product Type
Error 100429 blocks contributions when the Marketplace‑ID and Product Type pairing is unsupported. For example, using the US ID “ATVPDKIKX0DER” with Product Type “PetSupplies” for Canada (ID “A2EUQ1WTGCTBG2”) triggers the error. Verify IDs, consult the Product Type Definitions, and ensure the Content Contributor role is enabled.
Overview
Sellers may encounter error 100429 when they try to upload product content through feeds or the listing interface. The error signals that the marketplace‑product type pairing you selected does not permit the type of contribution you are submitting. Fixing it quickly is essential to keep catalog updates flowing without interruption.
Key Points
- Marketplace‑specific limits — Certain content contributions are only accepted in designated Amazon regions; a feed that works for .com may be blocked in .co.uk.
- Product‑type restrictions — Each Amazon product type defines a whitelist of allowable content types, and submitting outside that list triggers the error.
- Invalid marketplace‑type combos — Pairing a product type with a marketplace that does not support it results in a blocked contribution.
- Permission prerequisites — Your seller account must hold the proper rights for the exact marketplace and product type combination; lacking them leads to the same rejection.
How to Resolve Error 100429
- Inspect the processing summary — Open the feed processing report and locate the row flagged with error 100429; for example, a row showing Marketplace A‑ID = “A2EUQ1WTGCTBG2” and Product Type = “PetSupplies”.
- Confirm the marketplace identifier — Verify that the Marketplace ID in your XML/TSV matches the intended region; a common mistake is using the US ID (“ATVPDKIKX0DER”) while the product is listed for Canada (“A2EUQ1WTGCTBG2”).
- Cross‑check product‑type eligibility — Look up the product type in Amazon’s “Product Type Definitions” guide to see which content contributions are allowed; for instance, “PetSupplies” may accept only “BulletPoints” and “Images”, not “A+ Content”.
- Select a supported product type — If the current type is incompatible, switch to a type that permits the desired contribution, such as changing from “PetSupplies” to “PetFood” when you need to upload nutritional information.
- Validate account permissions — Ensure your seller profile has the “Content Contributor” role enabled for the target marketplace; you can confirm this in Seller Central under Settings → User Permissions.
Analysis & Recommendations
Why This Matters
A blocked feed halts catalog refreshes, delaying product visibility and sales. Sellers using the wrong Marketplace‑ID or a product type that disallows the contribution (e.g., PetSupplies not allowing A+ Content) see immediate rejections, requiring manual correction before the next upload.
Key Takeaways
- Error 100429 occurs when a Marketplace‑ID and Product Type combo is not permitted (e.g., US ID “ATVPDKIKX0DER” with Canadian marketplace).
- Product type “PetSupplies” only accepts BulletPoints and Images, not A+ Content, per Amazon’s Product Type Definitions.
- The seller account must have the “Content Contributor” role for the target marketplace to submit content.
- Switching to a compatible product type (e.g., “PetFood” for nutritional info) resolves the error.
Recommended Actions
- →Open Seller Central > Inventory > Add Products via Upload > Processing Summary and locate rows flagged with error 100429.
- →Confirm the Marketplace‑ID matches the target region (replace “ATVPDKIKX0DER” with the correct ID like “A2EUQ1WTGCTBG2” for Canada).
- →Check the Product Type Definitions guide, change to a supported type, and verify Content Contributor permission under Settings > User Permissions.
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