FNSKU vs UPC: A Bad Choice Today Could Devour Your Inventory a Year From Now!
FNSKU vs UPC: The Wrong Choice Could Devour Your Inventory!
The Critical Importance of Barcode Selection for Amazon FBA
For Amazon FBA (Fulfillment by Amazon) sellers, barcode selection is more than just a labeling issue. It's a pivotal factor that determines inventory management efficiency, brand reputation, and long-term losses. Specifically, attaching an FNSKU (Fulfillment Network Stock Keeping Unit) label to every FBA product is an essential strategy for seasoned sellers to proactively prevent inventory loss by completely eliminating the risk of commingled inventory.
The Risks of Using Manufacturer Barcodes (UPC/EAN)
Many new sellers overlook the importance of barcode selection when sending products to FBA. While using a manufacturer barcode (UPC/EAN) might seem convenient in the short term, it exposes your valuable inventory to the risk of 'commingled inventory,' where your products are mixed with identical items from other sellers.
⚠️ If another seller sends in defective or counterfeit products, customers might receive those items even if they purchased from your listing. The resulting negative reviews and customer complaints will directly and negatively impact your Account Health.
Under current policies, Amazon no longer provides FBA prep and labeling services, making it even more crucial for sellers to ensure accurate labeling themselves. Barcode selection and labeling are now a direct responsibility of the seller and a cornerstone of long-term business success.
Barcode Labeling: The Right Way vs. The Wrong Way
1. Barcode Type Selection
The Wrong Way: Using manufacturer barcodes (UPC/EAN) for all products and allowing Amazon to commingle inventory, prioritizing only short-term convenience. The Right Way: Attaching FNSKU labels to all FBA products to enable individual inventory tracking and ensure the integrity of your brand and inventory.
2. Handling Existing Barcodes
The Wrong Way: Attaching an FNSKU label to a product without completely covering the existing manufacturer barcode (UPC/EAN) or any other scannable barcode. This can lead to scan errors and inbound delays. The Right Way: When printing and attaching FNSKU labels, completely cover any original manufacturer barcodes (or other scannable barcodes) printed or affixed to the product, ensuring only one FNSKU barcode is scannable.
3. Labeling Bundled Products
The Wrong Way: For bundled products (multiple items sold as a single SKU), not attaching a barcode to the overall bundle packaging, but only to the individual components inside. The Right Way: Bundled products are assigned a unique FNSKU. You must attach the FNSKU label to the overall bundled package after it's assembled, and all barcodes on the individual components inside must be covered.
The Fatal Consequences of Incorrect Barcode Selection and Labeling
Incorrect barcode selection and labeling can lead to the following critical consequences for your Amazon business:
Inventory Loss and Misplacement: Commingled inventory means that defective or counterfeit products from other sellers could be sold as yours, making you responsible for returns and refunds. Furthermore, barcode errors can prevent products from being properly identified in the Fulfillment Center, leading to them being classified as 'Stranded Inventory,' halting sales, or even being disposed of. Customer Dissatisfaction and Deteriorating Account Health: Quality issues leading to customer complaints directly impact your ODR (Order Defect Rate), worsening your Account Health, and potentially leading to a suspension of selling privileges in severe cases. Inbound Delays and Additional Fees: If products are difficult to identify at the Fulfillment Center due to incorrect barcodes or labeling, inbound processing will be delayed, or Amazon may have to label the products themselves, incurring per-item fees.
Key FNSKU Labeling Strategies
1. Adhere to the FNSKU Usage Principle: When listing new FBA products, select 'Amazon barcode' (i.e., FNSKU) instead of 'Manufacturer barcode' to receive a unique FNSKU. This is the most reliable way to manage your inventory separately from other sellers' inventory. (Seller Central: Inventory → Manage FBA Inventory → Add a product or Edit to select barcode type) 2. Completely Cover Existing Barcodes: When printing and attaching FNSKU labels, ensure they completely cover any existing UPC/EAN barcodes on the product. Be careful not to expose more than one barcode. Only the FNSKU should be scannable. 3. Thorough Labeling for Bundled Products: For bundled products (multiple items sold as a single SKU), attach the FNSKU label to the overall bundled package after it's assembled, and cover all barcodes on the individual items inside. A unique FNSKU is required for the entire bundle.
Common Mistakes
The Complacent Thought: "I only send new products, so I'll be fine." If you use manufacturer barcodes, even if your products are new, they can be mixed with products from other sellers using the same manufacturer barcode. ⚠️ If those other sellers' products are defective, customers might receive a faulty item even if they purchased from your listing, and the responsibility will fall on you. Commingled inventory is a primary culprit in eroding long-term brand trust. Overlooking FNSKU Label Print Quality: Blurry or smudged labels are unscannable, leading to inbound delays or rejection at the Fulfillment Center. It's recommended to use a high-quality label printer and paper and to perform a scan test with a smartphone app after printing. Even if a label looks clean to the naked eye, scanners often fail to recognize it, so always double-check.