FNSKU labels are barcode labels used by Amazon to identify and track your FBA inventory inside Amazon fulfillment centers.
These labels contain your product’s:
FNSKU barcode
Seller-specific inventory information
Amazon scans these labels to determine which seller owns the inventory.
🏷️ What Does FNSKU Mean?
FNSKU stands for:
Fulfillment Network Stock Keeping Unit
It is a unique barcode assigned to your FBA inventory.
📦 Why FNSKU Labels Are Important
FNSKU labels help Amazon:
Track inventory ownership
Receive shipments correctly
Prevent seller inventory mix-ups
Fulfill customer orders accurately
👉 They are one of the most important parts of the FBA workflow.
🔍 What Information Is on an FNSKU Label?
An FNSKU label usually contains:
Barcode
FNSKU code
Product identifier
Sometimes product title information
Example:
X001ABC123
📍 Where Are FNSKU Labels Applied?
FNSKU labels are typically placed:
On the product packaging
Over manufacturer barcodes if required
👉 The barcode must remain easy to scan.
⚠️ Why Amazon Requires FNSKU Labels
Many sellers may sell the same ASIN.
FNSKU labels help Amazon know:
Which seller owns each item
Which inventory to ship for each order
🚫 Problems Caused by Missing or Incorrect Labels
Incorrect FNSKU labels can lead to:
Shipment receiving delays
Inventory errors
Misrouted inventory
Additional prep fees
Unfulfillable inventory
🖨️ How FNSKU Labels Are Printed
Sellers commonly print FNSKU labels using:
Thermal printers
Laser printers
QZ Tray integrations
Popular label sizes include:
2x1 labels
30-up sheet labels
🔄 How It Works in AccelerList
Within AccelerList:
FNSKU labels can be generated during FBA workflows
Sellers can print labels directly from batches and shipment processes
👉 Proper printer setup helps ensure barcode quality.
💡 FNSKU vs UPC
FNSKU | UPC |
Seller-specific | Universal product barcode |
Used by Amazon FBA | Used retail-wide |
Tracks inventory ownership | Identifies the product itself |
✅ Summary
FNSKU labels are seller-specific Amazon barcode labels used to identify and track FBA inventory inside fulfillment centers. They help Amazon process shipments accurately and prevent inventory mix-ups.