FNSKU stands for:
Fulfillment Network Stock Keeping Unit
An FNSKU is a unique barcode used by Amazon to identify and track your inventory inside Amazon FBA fulfillment centers.
It helps Amazon know:
Which seller owns the inventory
Which listing the product belongs to
How to process the item correctly
📦 Why FNSKUs Are Important
Many sellers can sell the same product on Amazon using the same ASIN.
The FNSKU helps Amazon distinguish:
Your inventory
fromOther sellers’ inventory
👉 This prevents inventory mix-ups.
🏷️ What Does an FNSKU Look Like?
An FNSKU is usually:
A barcode label
Alphanumeric
Unique to the seller and listing
Example:
X001ABC123
🔍 FNSKU vs ASIN
FNSKU | ASIN |
Tracks seller inventory | Identifies the product |
Unique per seller | Shared by all sellers |
Used in FBA warehouses | Used in Amazon catalog |
👉 Same ASIN can have different FNSKUs for different sellers.
📦 When Is an FNSKU Used?
FNSKUs are mainly used for:
Amazon FBA inventory
Product labeling
Shipment receiving
Inventory tracking
🏷️ Where Is the FNSKU Applied?
The FNSKU label is usually:
Printed on the product packaging
Applied over existing barcodes if needed
👉 Amazon scanners use the FNSKU during fulfillment processing.
⚠️ Important Notes
Every FBA item may require an FNSKU label
Incorrect or missing labels can cause:
Receiving delays
Inventory errors
Shipment issues
💡 Stickerless vs Labeled Inventory
Some sellers use:
Stickerless/commingled inventory
Others use:
FNSKU-labeled inventory for seller-specific tracking
👉 Many sellers prefer FNSKUs to avoid inventory mixing.
🔄 How It Works in AccelerList
Within AccelerList:
FNSKU labels can be generated and printed during batch workflows
Thermal printers and QZ Tray are commonly used for printing FNSKU labels
✅ Summary
An FNSKU is Amazon’s seller-specific barcode used to track FBA inventory ownership and processing inside fulfillment center