Your shipment arrives at Amazon’s fulfilment centre. Everything appears to be in order, until listings go inactive, units disappear from your available inventory count, or returned stock starts accumulating with unfamiliar labels attached.
The culprit in most of these cases is an LPN barcode on Amazon, a label most sellers have never heard of until it is already costing them money.
This guide explains exactly what an Amazon LPN barcode is, when Amazon assigns one, what it means for your FBA inventory and revenue, and the specific steps to take when LPN-labelled stock appears in your Seller Central account.
For sellers whose LPN barcode issues have contributed to account health problems or suspension risk, read our Amazon Account Suspension: Complete Guide to Prevention, Appeal & Reinstatement in 2026.
What Is an LPN Barcode on Amazon?
How Amazon Uses LPN Labels in Its Fulfilment Network
An LPN barcode, License Plate Number barcode, is an Amazon-generated internal tracking identifier. Unlike the FNSKU barcode that you apply to your products before sending them to a fulfilment centre, an LPN barcode is created and assigned by Amazon itself. Sellers have no control over when or whether Amazon assigns one.
LPN barcodes are applied to inventory that Amazon has moved out of active sellable status, typically because the item:
- Has been returned by a customer
- Has failed Amazon’s internal quality inspection
- Has been flagged as damaged during fulfilment centre processing
- Has been set aside as unfulfillable pending further review
Once an LPN barcode is assigned to a unit, that unit is no longer part of your active sellable inventory. It cannot be listed as new, cannot be sold through your standard FBA listings, and requires a deliberate action on your part, removal, disposal, or reimbursement claim, before it stops generating storage costs.
LPN Barcode vs FNSKU vs UPC: The Key Differences
Understanding Which Barcode Does What in Amazon’s System
Confusion between these three barcode types is one of the most common reasons sellers fail to act quickly when LPN inventory appears in their account.
UPC Barcode
A UPC (Universal Product Code) is a manufacturer-level barcode used for retail identification. For private label FBA sellers, the UPC is typically suppressed in favour of the FNSKU, Amazon requires branded products to use FNSKU labels to ensure accurate ownership tracking within its fulfilment network.
FNSKU Barcode
The FNSKU (Fulfilment Network Stock Keeping Unit) is the seller-specific barcode that Amazon assigns to each of your products. It connects each physical unit to your seller account. Every unit you send to an Amazon fulfilment centre should carry your FNSKU label, this is what ensures that sales of that product are credited to your account and not commingled with another seller’s inventory.
LPN Barcode Amazon
The Amazon LPN barcode is fundamentally different from both of the above. It is not a selling identifier, it is an internal warehouse tracking label. When Amazon assigns an LPN barcode to a unit, it is removing that unit from the normal inventory flow and placing it into a separate tracking system for returned, damaged, or unfulfillable stock.
The critical distinction: An FNSKU label means the unit is yours and available to sell. An LPN barcode means the unit is yours but not available to sell, and is actively generating storage fees while it sits in that status.
When Does Amazon Assign an LPN Barcode?
The Triggers That Move Inventory Into LPN Status
Amazon assigns LPN barcodes without seller notification in the following situations:
Customer Returns
Every customer return that enters Amazon’s returns processing system is evaluated against a set of condition criteria. Units that do not pass as new, regardless of whether they are actually damaged, are assigned an LPN barcode and moved to unfulfillable status. The evaluation is automated, which means condition grading is not always consistent, and units that are genuinely resellable as new are sometimes incorrectly classified as unfulfillable.
Fulfilment Centre Damage
Units that are damaged during Amazon’s internal handling, whether during receiving, storage, picking, or packing, are removed from active inventory and assigned an LPN barcode. When Amazon is responsible for the damage, sellers are eligible for reimbursement, but that reimbursement is not automatic. It requires a manual claim submission by the seller.
Quality Inspection Failures
Amazon conducts spot inspections of FBA inventory, particularly for products in health, beauty, and consumables categories. Units that fail inspection, or that Amazon suspects may be inauthentic based on its internal criteria, are pulled from active inventory and assigned LPN barcodes pending further review or disposal.
Stranded or Abandoned Inventory
Inventory that becomes stranded, because the associated listing is inactive, suppressed, or deleted, can be assigned LPN barcodes as Amazon’s system moves it out of the standard fulfilment flow. Sellers who delete or significantly modify listings without first managing the associated FBA inventory frequently discover stranded LPN inventory generating storage fees months later.
How LPN Barcodes Affect Your FBA Business
The Revenue and Account Health Consequences of Unmanaged LPN Inventory
Lost Revenue on Unsellable Units
Every unit assigned an LPN barcode is a unit that cannot generate a sale in its current state. For high-value SKUs or products with low return rates, a single wave of incorrectly classified returns can represent significant lost revenue, particularly if the units are genuinely resellable but have been graded as unfulfillable by Amazon’s automated system.
Ongoing Storage Fees on Dead Inventory
LPN-labelled units continue to occupy storage space in Amazon’s fulfilment centres and continue generating storage fees, including long-term storage fees for units that have been in unfulfillable status for more than 180 days. Sellers who do not monitor unfulfillable inventory regularly accumulate storage costs on stock that is generating zero revenue.
Reimbursement Delays and Missed Claims
When Amazon is responsible for the damage or loss that generated the LPN assignment, through handling damage, receiving discrepancies, or fulfilment errors, sellers are eligible for reimbursement. However, Amazon does not automatically process these reimbursements. Sellers must identify the eligible units, build the reimbursement case, and submit it within Amazon’s claim window. Sellers who do not monitor their LPN inventory miss these claims entirely.
Impact on Amazon SEO and Listing Health
High return rates, which are directly connected to frequent LPN barcode assignments, affect Amazon’s algorithm assessment of your listing quality. Elevated return rates reduce Buy Box eligibility, increase the cost-per-click of sponsored ads, and can trigger listing suppression in categories where return rate is a monitored compliance metric. For sellers whose account health metrics have been affected by FBA inventory issues, read our guide on why Amazon seller accounts get suspended for performance.
How to Find LPN Barcode Inventory in Seller Central
Locating and Reviewing Your Unfulfillable Stock
Step 1: In Seller Central, navigate to Inventory → Manage FBA Inventory → Unfulfillable Inventory tab. LPN-labelled units appear here separately from your active sellable stock.
Step 2: Download your inventory reports, specifically the FBA Inventory Report and the Returns Report, to get a complete picture of LPN-assigned units, the reason codes Amazon has recorded for each, and the dates on which they were moved to unfulfillable status.
Step 3: Cross-reference the LPN units against your shipment records and sales history to identify whether any represent Amazon fulfilment errors that qualify for reimbursement claims.
Step 4: Review return trends across your LPN inventory. If multiple units from the same ASIN are consistently being assigned LPN barcodes as customer returns, that pattern indicates a listing accuracy, packaging, or product quality issue that needs to be addressed at the source, not just managed at the inventory level.
What to Do When You Find LPN Barcode Inventory
Four Actions That Protect Your Revenue and Margins
Request Removal for Resellable Units
Units that have been assigned LPN barcodes due to customer returns but are genuinely in new or like-new condition can be removed from Amazon’s fulfilment centre, relabelled with your FNSKU, and returned to sellable inventory, either through FBA reinstatement or alternative fulfilment channels. Submit a removal order through Seller Central and inspect the returned units before deciding on relabelling.
Submit Reimbursement Claims Promptly
For units damaged by Amazon during handling, identifiable through reason codes in your inventory reports, submit reimbursement cases through Seller Central’s reimbursement tool. Amazon has claim windows, and delayed submissions result in ineligible cases. Regular monthly audits of unfulfillable inventory ensure claims are submitted within the eligible window.
Address Root Cause Through Listing Optimisation
If LPN assignments are consistently driven by customer returns citing inaccurate product descriptions or unmet expectations, the fix is in the listing, not in the returns process. Improving main images, A+ Content accuracy, and bullet point specificity reduces return rates and therefore reduces the frequency of future LPN assignments. For a full listing optimisation framework, explore our Amazon Account Management Services.
Improve Packaging to Reduce Damage-Related LPNs
Units receiving LPN barcodes due to damage during fulfilment centre handling often reflect insufficient protective packaging rather than Amazon handling errors. Reviewing your FBA prep requirements and upgrading packaging for fragile or high-return-rate SKUs reduces damage-related LPN assignments and the associated revenue loss.
How EcomManagers Manages LPN Barcode Issues for FBA Sellers
EcomManagers treats LPN barcode Amazon management as a core component of FBA account health, not an afterthought. Our FBA inventory management support includes:
- Monthly unfulfillable inventory audits to identify LPN-labelled stock
- Reimbursement case preparation and submission for Amazon-caused damage and loss
- Return trend analysis to identify listing or packaging issues driving repeat LPN assignments
- Removal order management for resellable units eligible for relabelling
- Ongoing FBA compliance monitoring to prevent inventory health issues from escalating into account-level risk
We manage FBA inventory health and account compliance for sellers across Amazon Services USA, Amazon Services UK, Amazon Services UAE, and Amazon Services Germany.
Explore our Amazon Account Management Services and speak with an FBA specialist today.
Frequently Asked Questions
What is an LPN barcode on Amazon?
An Amazon LPN barcode (License Plate Number) is an internal tracking label that Amazon generates and assigns to inventory that has been moved out of active sellable status, typically returned units, damaged stock, or items that have failed Amazon’s quality inspection. LPN-labelled units cannot be sold as new through standard FBA listings.
Can LPN barcode products be resold on Amazon?
Not in their current LPN status. To return an LPN-labelled unit to sellable inventory, you must first request a removal order, receive the unit back, inspect it, and relabel it with your FNSKU before sending it back into FBA. Units that are not resellable as new can be disposed of through Amazon or returned to you for liquidation through alternative channels.
Why did Amazon give my product an LPN barcode?
Amazon assigns LPN barcodes when a unit is returned by a customer, damaged during fulfilment centre handling, flagged during a quality inspection, or stranded due to a listing status change. The assignment is automated and does not always reflect the actual sellable condition of the unit.
Where can I find LPN barcode inventory in Seller Central?
LPN-labelled inventory appears under Inventory → Manage FBA Inventory → Unfulfillable Inventory. Detailed information including reason codes and assignment dates is available in the FBA Inventory Report and Returns Report downloads.
Are sellers eligible for reimbursement on LPN barcode units?
Yes, when Amazon is responsible for the damage or loss that generated the LPN assignment, sellers are eligible for reimbursement. These claims are not automatic and must be submitted manually within Amazon’s claim eligibility window. Regular monthly inventory audits are the most reliable way to ensure eligible claims are not missed.
Conclusion
LPN barcodes are more than just internal Amazon labels, they are signals that inventory has moved out of sellable status and may be costing your business revenue, storage fees, and reimbursement opportunities. Sellers who actively monitor unfulfillable inventory, audit return trends, and address packaging or listing issues early can significantly reduce inventory loss and protect FBA profitability. In 2026, strong inventory management is not just an operational advantage, it is a critical part of maintaining long-term Amazon account health and business growth.