Start with the package
Look for the human-readable digits printed below or beside the barcode on the exact size, color, quantity, and packaging being sold.
Product data and shopping feeds
How to Find a GTIN
Use the identifier assigned to the exact trade item. Never guess, recycle, or invent one.
A Global Trade Item Number helps marketplaces and commerce systems identify a product consistently. Find it on the packaging or in authoritative manufacturer, supplier, or GS1 records, then store it on the matching CMS Max product or variation.
- GTIN-8, 12, 13, 14
- Manufacturer source
- Variation-level identity
- No Identifier option
Operating model
A GTIN identifies the trade item; an SKU organizes your business.
They can appear together, but they solve different problems. A supplier SKU, model number, and barcode are not automatically interchangeable.
Confirm with an authoritative source
Use manufacturer documentation, supplier data, GS1 records, or other verified product records when the packaging is missing or ambiguous.
Use No Identifier honestly
Custom-made, handmade, vintage, private-label, or other products may legitimately lack a manufacturer-assigned GTIN. Follow the destination channel rules.
Current CMS Max capability
CMS Max accepts the standard GTIN lengths used in commerce.
Enter the value under eCommerce > Products > Attributes. The product record validates the supported format, while downstream channels may add their own policy checks.
GTIN-8
Eight digits, commonly used where package space is limited. Use the complete assigned value including any leading zero.
GTIN-12 / UPC-A
Twelve digits, commonly used for North American retail products. Do not remove leading zeros.
GTIN-13 / EAN-13
Thirteen digits, widely used internationally and for product categories that use EAN-family identifiers.
GTIN-14
Fourteen digits, often used for cases, cartons, multipacks, or other packaging levels that are separate trade items.
Variation identity
Distinct sellable variations generally need the GTIN assigned to that exact variation. Confirm the manufacturer data and destination-channel rules.
Catalog controls
CMS Max stores the GTIN with other product attributes and can expose product data to supported feeds and integrations.
Step-by-step workflow
Trace the number from source to listing.
A clean identifier workflow prevents mismatched products, feed disapprovals, incorrect price comparisons, and difficult catalog corrections.
Identify
Confirm the exact product, brand, model, variation, pack count, and packaging level being listed.
Locate
Read the barcode digits or request the GTIN from the manufacturer, brand owner, authorized supplier, or distributor.
Verify
Check the length, leading zeros, check digit, and product match. Do not use a barcode image alone if the digits are unclear.
Enter
Open the CMS Max product, select Attributes, enter the verified GTIN, or select No Identifier when that is truthful.
Monitor
Review shopping-feed diagnostics and correct the source record if a marketplace reports an identifier mismatch.
Practical reference
Know where not to get the number.
A plausible-looking value can still identify another product and create long-lived catalog problems.
- Do use
- Packaging, manufacturer records, brand-owner data, authorized supplier files, GS1 resources, and verified purchase records.
- Do not use
- A made-up number, an internal SKU, a different variation, a case code for a single unit, or a random barcode lookup result without a product match.
- Products you manufacture
- License identifiers through the appropriate GS1 member organization or another channel-approved issuing path; current fees and terms should be checked at the source.
- Marketplace policy
- A valid GTIN does not guarantee approval. Destination channels evaluate identifier requirements, brand data, product type, and feed consistency.
Current references
Use live product and provider evidence.
Interfaces, policies, plans, services, pricing, and requirements can change. Verify the current CMS Max configuration and official provider sources during implementation.
How to Find a GTIN FAQ
Resolve the practical questions before launch.
Turn each answer into configuration, representative testing, monitoring, ownership, and a documented recovery path.
Is a GTIN the same as an SKU?
No. A GTIN is a standardized trade-item identifier assigned by a brand owner or authorized issuer. An SKU is an internal code the merchant creates for inventory and operations.
Do leading zeros matter?
Yes. Keep the full assigned identifier. Removing a leading zero changes the value and may change the apparent GTIN format.
Does every variation need its own GTIN?
Use the identifier assigned to the exact sellable variation. Different sizes, colors, quantities, or packaging levels often have different GTINs; verify the source rather than applying a blanket exception.
What if the product has no manufacturer GTIN?
Use No Identifier only when that is accurate, then follow the rules of each shopping destination for custom, handmade, vintage, private-label, or otherwise unassigned products.
Does CMS Max validate marketplace eligibility?
CMS Max validates the product field format. Google, marketplaces, and feed destinations apply additional policies and diagnostics to the submitted catalog.
Build for real operations
Make product identity a reliable part of the catalog.
CMS Max connects product attributes, variations, feeds, search, storefront merchandising, orders, and integrations so clean identifiers improve the whole commerce system.
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