One of the most common questions new Amazon sellers ask is whether Merchant Fulfilled (MF) items require an FNSKU label. The answer depends on how the item is being fulfilled.
In most cases, Merchant Fulfilled items do not require an FNSKU because the inventory remains in the seller's possession and is shipped directly to customers by the seller.
What Is an FNSKU?
FNSKU stands for Fulfillment Network Stock Keeping Unit.
It is a unique barcode generated by Amazon that identifies inventory stored within Amazon's fulfillment network. Amazon uses FNSKU labels to track products received, stored, and shipped from their fulfillment centers.
FNSKU labels are primarily used for FBA inventory.
What Is Merchant Fulfilled (MF)?
Merchant Fulfilled (MF) inventory refers to products that are stored and shipped by the seller rather than Amazon.
When a customer places an order, the seller is responsible for:
Storing inventory
Packing orders
Shipping orders
Handling fulfillment-related processes
Since Amazon never physically receives the inventory, there is no need for Amazon's fulfillment centers to track it using an FNSKU.
Do MF Items Require an FNSKU?
No. Merchant Fulfilled items do not require FNSKU labels because they are not sent to Amazon fulfillment centers.
Instead, Amazon identifies the product using information such as:
ASIN
ISBN
UPC
EAN
Seller SKU (MSKU)
These identifiers are sufficient for listing and selling MF inventory.
When Is an FNSKU Required?
FNSKU labels are generally required when:
Listing inventory as FBA
Sending inventory to Amazon fulfillment centers
Amazon requires Amazon-specific product labeling
Once inventory enters Amazon's fulfillment network, Amazon uses the FNSKU to identify and track each item.
What About MF Tickets?
Many sellers use MF tickets to help organize inventory.
An MF ticket may contain information such as:
SKU or MSKU
Shelf location
Product condition
Price
Internal barcode
These labels are designed to help sellers locate and manage inventory more efficiently.
Unlike FNSKU labels, MF tickets are not required by Amazon and are used solely for internal inventory management.
FNSKU vs MF Ticket
Feature | FNSKU | MF Ticket |
Required for FBA | Yes | No |
Required for MF | No | No |
Used by Amazon Fulfillment Centers | Yes | No |
Used for Internal Inventory Management | No | Yes |
Generated by Amazon | Yes | No |
Benefits of Using MF Tickets
While not required, MF tickets can help sellers:
Locate products faster
Organize inventory shelves
Reduce fulfillment errors
Improve warehouse efficiency
Simplify order processing
Many Merchant Fulfilled sellers rely on MF tickets as part of their inventory management workflow.
Final Thoughts
Merchant Fulfilled items do not require FNSKU labels because the inventory is stored and shipped by the seller rather than Amazon. While FNSKUs are essential for FBA inventory, MF sellers can use identifiers such as ASINs, UPCs, and MSKUs to manage listings.
For improved organization, many sellers choose to print MF tickets, but these are optional tools for inventory management and are not required by Amazon.