Below is a list of common validation errors and solutions from Amazon:



Validation ErrorSolution
You are not authorized to list products under this brand

To solve this error, follow below procedure:

a) In Seller Central, click the inventory link and select ‘Add a Product’.

b) Run a search for the item you wish to sell.

c) In the search results, click the ‘Listing limitations apply’ link for that item.

d) Click the Request Approval button to begin the application process.

To check the status of an application, return to the ‘Add a Product’ tool and click the Selling application status link located toward the top of the page in your Amazon selling account.

You are not authorized to list products in this product line or category.
Some categories and product lines require approval from Amazon before you can list.  For more information see Categories and products that require approval
Merchant is not authorized to sell products under this restricted product group.

To request approval, either contact Seller Support or

follow the steps below:

a) In Seller Central, click the inventory link and select ‘Add a Product’.

b) Run a search for the item you wish to sell.

c) In the search results, click the Listing limitations apply link across from the item.

d) Click the Request Approval button to begin the application process.

To check the status of an application, return to the Add a Product tool and click the Selling application status link located toward the top of the page. For more information please see Restricted Products

Missing Attributes standard_product_id.
  • There is no barcode (UPC/EAN) associated with the product or one of the variants . Add the relevant barcode and resubmit.
  • The barcode you have provided is not recognised by Amazon. Please check it is the correct registered barcode for your product.
The SKU data provided conflicts with the Amazon catalog.
The data provided by the retailer is conflicting with what Amazon has in the database. For example  (Merchant: '' / Amazon: '16192'). The retailer can update their content to match Amazon OR petition Amazon to change the data.
A value is required for the "part_number" field
MPN is required
You cannot change the 'item_classification' for SKU 'XXX' by submitting a feed with a new value. To change this attribute, do the following: 1) Submit a feed to delete the existing SKU. 2) Submit a feed to recreate the SKU with the updated 'item_classification'.;
This product classification has changed from a multi variant / single variant OR single variant / multi variant. For more information see Change variant
Marketplace Product Variant SKUs are not unique
This product variants are duplicated.  Variant attributes need to be unique  for example colour black, size small etc
Please provide a variation theme when creating a variation parent.
The variation used for a product is not yet configured for that category in Omnivore.  Omnivore Amazon integration is currently only configured to support colour and size. 
UPC/EAN is too short/long
The barcode UPC is missing characters or contains too many.  Please check the UPC against that product.
The "Message/Product/DescriptionData/MerchantShippingGroupName" (XXX) field contains an invalid value.
This indicates that the shipping policy in Omnivore does not match the naming convention in Amazon.  The shipping template name must be replicated exactly and is case sensitive.
Cannot serialise to Amazon Australia feed format, error = Cannot find the Amazon product type
The category is not yet available on Amazon Australia
A value is required for 'department_field'
There is a required attribute for a specific category / sub category. Add in the Attribute and resubmit the feed.
A value is required in the "dvd_region" field because there are values in dependent fields.
DVD region is required by Amazon to list in this category. If the data is not in your feed, you can add it via Marketplace attribute section. See FAQ on this   
A value is required in the "blu_ray_region" field because there are values in dependent fields

Blue Ray Region is required by Amazon to list in this category. If the data is not in your feed, you can add it via Marketplace attribute section. See FAQ on this
Cannot serialise to Amazon Australia feed format, error = Failed to marshal payload : The content of element 'BooksMisc' is not complete. One of '{Author, Binding}' is expected.]]
If the product is mapped to a "book" category, you must supply all the required information, like Author.
If its not a book, map it to the correct category. 
We do not support the file type of the image uploaded
Amazon does not support all image types particularly gifs. To block unsupported images please see this Article
A value is missing from one or more required columns from this group: [is_expiration_dated_product = "true"], [product_expiration_type = "Expiration Date Required"],
Add a marketplace attribute for is_expiration_dated_product with a value of No