How to Resolve FBA Shipment Discrepancies and File Reimbursement Claims

FBA shipment discrepancies occur when the quantity of units Amazon receives and checks into FBA inventory differs from the quantity you shipped. This is a common occurrence: industry surveys indicate that 5 to 15 percent of FBA shipments have some discrepancy between shipped and received quantities. For Taiwan brands shipping large volumes of inventory across multiple Amazon marketplaces, even a 3 to 5 percent discrepancy rate can translate into thousands of dollars in missing inventory annually. Understanding the causes, tracking processes, and claim procedures is essential for protecting your margins and ensuring accurate inventory records.

Discrepancies arise from multiple sources throughout the supply chain. At the 3PL or warehouse level, the most common cause is miscounting during packing, where the number of units packed into cases differs from the packing list quantity. Mislabeling is another frequent cause: if FNSKU labels are applied to the wrong products or if case labels show incorrect quantities, Amazon's receiving team will log different quantities than expected. During transit, rough handling can cause cases to break open, spilling units that are separated from the shipment. At the Amazon FC, receiving errors occur when workers scan and count incoming inventory, particularly during peak season when temporary staff may be less experienced with receiving procedures.

Amazon's receiving process involves scanning each case's barcode, opening a random sample of cases to verify contents and quantities, and checking individual units against the shipment manifest. If Amazon's count matches the shipment plan, the shipment is closed with no discrepancy. If there is a difference, Amazon marks the shipment as having a discrepancy and begins an investigation period. Amazon does not always physically count every unit in every case, relying on statistical sampling for large shipments. This sampling approach means that receiving errors can go in both directions: Amazon may record fewer units than shipped (a shortage) or more units than shipped (an overage).

The financial impact of unresolved discrepancies extends beyond the missing inventory value. Each missing unit represents lost revenue potential, and if the units are permanently lost, you bear the cost of goods sold, the international shipping cost to deliver them to the US, and the prep and labeling costs incurred at your 3PL. For a Taiwan brand selling a product with a $15 wholesale cost and $5 in shipping and prep per unit, each unresolved missing unit represents a $20 loss. At a 5 percent discrepancy rate on 10,000 units shipped annually, the total exposure is $10,000 per year, making diligent reconciliation and claim filing a high-ROI activity.

Amazon's shipment reconciliation process follows a defined timeline that sellers must understand to file claims within the eligible window. When a shipment is delivered to the FC, Amazon begins the receiving process, which typically takes 3 to 14 business days depending on FC workload and the shipment size. During receiving, Amazon's system updates the shipment status in Seller Central from "Delivered" to "Checked In" and finally to "Closed." A shipment is not considered fully received until Amazon closes it, and discrepancies can only be investigated after the shipment reaches "Closed" status.

After a shipment is closed, Amazon conducts an automatic reconciliation by comparing the received quantity against the shipped quantity in the shipment plan. If a discrepancy exists, the shipment status will show "Closed - Discrepancy" in Seller Central under the Shipment Summary page. Amazon then initiates an automatic investigation that can take up to 30 days. During this period, Amazon searches for the missing units within the FC, checks if they were accidentally added to another seller's inventory, and reviews the receiving documentation. In some cases, Amazon locates the missing units and adds them to your inventory without requiring a claim.

If the automatic investigation does not resolve the discrepancy, you have the right to file a manual claim. The claim filing window opens after the automatic investigation period ends (typically 30 days after shipment close) and remains open for up to 9 months after the shipment was delivered to the FC. After 9 months, the claim window closes permanently, and you forfeit any right to reimbursement for that shipment. LNH31 Global strongly recommends filing claims within 60 days of shipment close to ensure timely processing and avoid approaching the deadline.

To track reconciliation status, navigate to Seller Central and go to Inventory > Shipments, then select the specific shipment. The Shipment Summary page shows the shipped quantity, received quantity, and any discrepancy. Click on the "Reconcile" tab to see the detailed unit-level breakdown, including units received, units in research (being investigated), and units with open reconciliation cases. Monitor this page weekly for all open shipments and set calendar reminders for the 30-day and 60-day marks after each shipment closes to ensure you do not miss the claim filing window.

To file a discrepancy claim, go to Seller Central and navigate to Help > Get Help > Fulfillment by Amazon > FBA Shipment Issues > Investigate a Shipment. Enter the shipment ID and select "I want to investigate a discrepancy." Amazon will present a form asking for the shipment details, the specific SKUs with discrepancies, and the documentation supporting your claimed quantities. Complete all fields accurately, as errors or inconsistencies in the claim form can result in denial. The claim should specify the exact number of missing units per SKU, referencing the difference between your shipped quantity (supported by documentation) and Amazon's received quantity.

Documentation is the single most important factor in the success or failure of a discrepancy claim. Amazon requires proof that you shipped the claimed quantity, which can include: a Bill of Lading (BOL) showing the number of cartons and total weight shipped, a detailed packing list itemizing the contents of each carton by SKU and quantity, photographs of the packed cartons showing case labels and FNSKU labels, and a Proof of Delivery (POD) signed by the Amazon FC receiving team confirming the number of cartons delivered. The packing list is particularly critical and should be generated from your 3PL's warehouse management system with a timestamp, carton-level detail, and total unit counts per SKU.

Your 3PL plays a crucial role in documentation quality. Require your 3PL to implement the following documentation procedures for every FBA shipment: weigh each carton and record the weight on the packing list, photograph each carton's case label before sealing, photograph the loaded pallet from at least two angles, obtain a signed BOL from the carrier at pickup, and obtain a signed POD from the Amazon FC at delivery showing the number of cartons received. This documentation package costs your 3PL minimal additional effort but dramatically increases your claim success rate from the industry average of 50 to 60 percent to over 85 percent.

After filing the claim, Amazon's investigation team reviews the documentation and either approves or denies the claim, typically within 7 to 14 business days. If approved, Amazon reimburses the missing units at the product's current selling price minus Amazon's referral fee and FBA fulfillment fee, which typically results in a reimbursement of 60 to 75 percent of the retail selling price. If denied, you can appeal the decision by providing additional documentation or clarification. Appeals should be filed within 30 days of the denial and should specifically address the reasons cited in the denial notice. LNH31 Global has found that approximately 30 percent of initially denied claims are approved on appeal when additional documentation is provided.

Prevention is more cost-effective than remediation when it comes to FBA shipment discrepancies. The most impactful prevention measure is accurate counting and labeling at the 3PL warehouse. Implement a two-person verification system where one person counts and packs each carton and a second person independently verifies the count before the carton is sealed. This simple process reduces packing errors by 80 to 90 percent and costs only 30 to 60 seconds of additional labor per carton. Additionally, use a digital scale to weigh each carton and compare the actual weight against the expected weight (calculated from unit weight x quantity). Weight discrepancies of more than 2 percent should trigger a recount before shipping.

Barcode scanning during the packing process provides an additional layer of accuracy. Rather than relying on manual counting, have your 3PL scan each unit's FNSKU barcode as it is placed into the carton. The scanning system automatically counts the units and compares the scanned quantity against the shipment plan quantity. If there is a mismatch, the system alerts the packer before the carton is sealed. Many warehouse management systems (WMS) support this scan-to-pack workflow, and the cost of implementing barcode scanning is typically $2,000 to $5,000 for hardware (scanners and tablets) plus $100 to $300 per month for software.

Several third-party tools automate the FBA reconciliation process by monitoring your shipments and alerting you to discrepancies. Refund Manager, GETIDA, and Sellerboard's reimbursement module automatically track all FBA shipments, identify discrepancies after shipment close, and either file claims on your behalf or generate claim-ready documentation for your review. These services typically charge 15 to 25 percent of recovered reimbursements as their fee, meaning they cost nothing if no reimbursements are recovered. For Taiwan brands managing 20 or more FBA shipments per month, automated reconciliation tools save 5 to 10 hours of manual tracking time per month and improve total recovery rates by identifying discrepancies that might be overlooked in manual reviews.

LNH31 Global recommends establishing a monthly reconciliation review process. On the first business day of each month, review all FBA shipments that closed in the previous month. For each shipment with a discrepancy, verify that an automatic investigation is in progress or that a manual claim has been filed. Track the status of all open claims in a spreadsheet or project management tool, noting the claim filing date, the documentation submitted, and the expected resolution date. Calculate your monthly discrepancy rate (missing units / shipped units) and track it as a key performance indicator. If your discrepancy rate exceeds 5 percent consistently, investigate the root cause by auditing your 3PL's packing procedures, carrier handling practices, and the specific Amazon FCs receiving your shipments.