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Product Identifiers (more commonly known as product IDs) are universally accepted codes that are unique to every item sold. As a Marketplace seller, you’re required to comply with the product ID policy after you begin selling to build customer trust and provide a consistent experience for customers. Keep reading to learn about this policy. Â
What is the policy?
Walmart requires that all items sold on Walmart Marketplace have product IDs. Walmart uses product IDs to help identify which item you're selling and if the same item is sold elsewhere. Product IDs also help establish variant groups across different sellers.  
Walmart ensures the authenticity of product IDs and accuracy of product information by cross-referencing them with the GS1 database. GS1 is a global standards organization that provides unique identifiers, such as the Global Trade Item Number (GTIN), to help businesses efficiently manage their supply chains and track products. Listings with invalid product IDs will be removed and may lead to the temporary or permanent suspension of your Marketplace account.Â
Any product IDs that aren't recognized by GS1 and not designated for Marketplace will be deemed invalid such as:Â
Those assigned to coupons, refunds or restricted circulation numbersÂ
Product IDs that aren't used correctly (e.g., an apparel item assigned a product ID designated for books)Â
An item registered for one brand but set up under a different brandÂ
An item registered by a company set up under a brand name not related to that companyÂ
To avoid discrepancies with the GS1 database, we recommend obtaining your product IDs directly from GS1.
Learn more about the scope and assignment of ISBNs.Â
Additional guidelines
Each product must have its own unique product ID for setup, even if multiple identifiers like GTIN and UPCs exist. The reuse of product IDs for separate items is strictly prohibited.Â
This table indicates the four types of products IDs accepted by Walmart. If you have a different type of product ID, you must convert it to one of these types. Check with the organization that manages your product ID to learn how to convert it to an acceptable type.  
Accepted type | Name | Purpose | Acceptable digits |
---|---|---|---|
GTIN | Global Trade Item Number | General purpose, used worldwide | 14 digits |
UPC | Universal Product Code | General purpose, used primarily in North America | 12 digits |
ISBN | International Standard Book Number | For use only with books and publications | 10 or 13 digits |
EAN | European Article Number | Used primarily outside of North America | 13 digits |
Model numbers or SKU numbers aren't considered valid product IDs.Â