For anyone new to selling on Amazon or other marketplaces, product identifiers like UPC and GTIN codes can feel like alphabet soup. Yet they’re fundamental to getting your products listed correctly. This guide explains what these codes are, how they relate to each other, and what new sellers need to do to stay compliant.
UPC, GTIN, EAN — How They Relate
These terms are often used interchangeably, but here’s the clear breakdown:
- GTIN (Global Trade Item Number) is the umbrella term for all standard product identifiers.
- UPC is a 12-digit GTIN used in the US and Canada.
- EAN is a 13-digit GTIN used globally.
- ISBN is the GTIN format used for books.
So a UPC is a GTIN — when a marketplace asks for a GTIN, a valid UPC or EAN satisfies the requirement.
Why Product Identifiers Matter on Amazon
Product choices and buyer satisfaction are central to Amazon’s success. Sellers who provide industry-standard identifiers improve the overall quality of the Amazon catalog — from books to hand tools — and help buyers find exactly what they’re looking for. In most categories, you must provide a valid identifier to create a new product page or match an existing one.
Using the Correct Identifier
Sellers must use the correct product identifier for the item they’re listing. Using incorrect, recycled, or purchased non- codes is prohibited and can result in listing suppression or account suspension. The required GTIN type can vary by category, so always confirm your category’s rules before listing.
Exemptions and Alternatives
- Brand Registry: In non-media categories, brand owners can apply to use a GCID (Global Catalog Identifier) instead of a UPC/EAN by enrolling in the Amazon Brand Registry.
- GTIN Exemption: Brands without a verifiable barcode can request a UPC/EAN exemption. Requirements vary by category.
- Collectibles & Rare Items: In some categories, a manufacturer’s model and part number may be accepted in place of a UPC/EAN.
Certain restricted products are never permitted on Amazon regardless of identifier — always check the Restricted Products guidelines.
What Makes a UPC “Valid”?
Amazon verifies the accuracy of product identifiers against the official barcode database. EANs/UPCs that don’t match the registry’s records are treated as invalid. To avoid problems, obtain your identifiers from Direct registrationly, or from an authorized reseller that supplies authentic codes — rather than unknown sources selling recycled licenses.
Getting Started as a New Seller
- List every product and variant you plan to sell.
- Confirm whether your category requires a GTIN (most do).
- Obtain authentic UPC/EAN codes — one per variant.
- Enter each code in the product ID field when creating your listing.
- Keep a record mapping every product to its code.
Conclusion
UPC and GTIN codes are simply the standardized way marketplaces identify your products. Understand the relationship between them, use the correct authentic identifier for each item, and check your category’s rules. Get this right from the start and you’ll avoid the most common listing errors new sellers face.
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