Your FNSKUs come back with a status.
Matched, Over, Reimbursed, Take Action, No Snapshot. You open the ones that need you and leave the rest alone.
2025–2026 Policy Update — 60-day claim window now active
Know what happened to your FBA units.
Not an estimate, and not Amazon's word for it. Upload the reports you already export and Leviathan Recon reconstructs what happened to your stock. Shipment by shipment, return by return, per FNSKU.
No credit card. No API access. No Seller Central password.
Leviathan Recon dashboard preview and audit statistics
Client account
Leviathan Recon
- Dashboard
- Upload reports
- Data explorer
- Inventory recon
- Action center
- Settings
Leviathan Recon
Reconciliation summary
Data span: Apr 2024 – Apr 2026
- Shipped to FBA
- 111,605
- FBA received
- 104,361
- Net shortage
- 7,244
- Reimbursed
- 683
- Reconciled OK7,538
- Need to check311
- System flag256
- In transit394
Shipment recon
Returns recon
Adjustment recon
Full inventory recon
- How the ledger is rebuilt
- Per FNSKU
- Amazon report types ingested
- 16 reports
- A few of the row statuses you read on screen
- Matched, Over, Take Action…
- One per client, not a shared table
- Your database
What you get, how you check it, and what it costs to try.
Open the number, read the rows.
Figures on screen are assembled from rows in the files you uploaded, and the rows behind them are a click away. You check a variance yourself instead of asking us to explain it.
Four reports is enough to start.
Recon reads sixteen Amazon report types, but you do not need them all on day one. Fourteen days free, no card, and your own workspace with your own database.
Reconciliation modules
Amazon reports the balance. We reconcile how it got there.
The problem
Most FBA sellers are leaving money on the table.
Amazon only fixes discrepancies if you identify and claim them within 60 days. After that window closes, the money is gone permanently. Not sure how much fees already eat into each unit? Check your true margins with our free Amazon FBA calculator.
Lost inventory goes unclaimed
Amazon's fulfillment centres process millions of transactions daily. At that scale, lost and damaged units slip through — and Amazon only fixes them if you identify and claim them within 60 days.
Seller-initiated
many valid cases need a claim from you, not an auto-credit
The 60-day window closes fast
From January 2025, Amazon cut the claim filing window from 18 months to just 60 days. Every day without an audit, older discrepancies expire permanently — regardless of claim validity.
60 days
maximum claim window since Jan 2025
Manufacturing cost — not selling price
Since March 2025, Amazon reimburses at production cost, not selling price. Without accurate COGS documentation filed with each claim, Amazon falls back to its own internal estimate — typically below what you actually paid to produce the unit.
Cost basis
your documented cost, or Amazon's lower estimate
Process
Two ways to work with us. Both start the same way.
1
Export and upload
You download your standard Amazon reports and upload them. No API connection, no account linking, no password.
Insights
Learn from our FBA experts.
What you get
What a reconciled account looks like.
This is one managed client account, anonymised, covering April 2024 to April 2026. SKUs, titles and identifiers have been removed. It shows the shape of a reconciliation, not a forecast of your own account.
Who we work with
Categories we serve
- Books & Publishing
- Home & Kitchen
- Sports & Outdoors
- Consumer Electronics
- Apparel & Accessories
- Beauty & Personal Care
- Health & Wellness
- Toys & Baby
- Office & Stationery
- Pet Supplies
- Garden & Outdoor
- Automotive Accessories
What FBA sellers say about us.
Client feedback. Individual results vary.
“Leviathan Sellers audited our entire Amazon account and found discrepancies we had completely overlooked for months. They handle our ongoing reconciliation and consistently recover $130–$300 every month that would otherwise be lost.”
FellowBooks.com
Amazon FBA Seller, Books & Media · US
“We were losing money every month to Amazon reimbursement discrepancies we did not even know existed. Leviathan Sellers audited our full account, identified every valid claim, and recovered amounts we had written off completely.”
Books & Stationery Seller
Amazon FBA · United Kingdom
“Leviathan Sellers set up our entire Amazon account from scratch and made the process completely stress-free. Their pricing strategy guidance helped us position our listings correctly from day one.”
✓ Account setup & pricing strategy
Home & Kitchen Seller
Amazon · India
“After Amazon shortened the claim window we were worried about everything slipping away. Leviathan Sellers now audits our account daily and files each claim with proper cost documentation, so nothing expires unnoticed anymore.”
Sports & Outdoors Seller
Amazon FBA · Canada
“The monthly statements showing every claim filed, approved, and denied gave us complete visibility we never had before. Their team appeals denials on our behalf and consistently recovers reimbursements we had assumed were gone for good.”
Home & Garden Seller
Amazon FBA · United States
“Manual, individually documented claims made all the difference — no bulk automation, no shortcuts. Leviathan Sellers reconciles our fulfilment discrepancies accurately and keeps our account health metrics firmly in the green.”
Apparel & Accessories Seller
Amazon · United Kingdom
FAQ
Common questions from FBA sellers.
Two major changes. From January 2025, the claim filing window dropped from 18 months to 60 days — any claim filed after this is permanently rejected. From March 2025, Amazon switched reimbursements from estimated sale value to manufacturing cost. Without accurate cost evidence submitted with each claim, Amazon uses its own internal estimate, which typically lands below actual production cost.
There are two ways to work with us, and both start the same way: you export your standard reports from Seller Central and upload them. We hold no credentials and no account access, so we cannot make purchases, change listings, or move funds. With Leviathan Recon you take it from there yourself — the platform rebuilds your unit ledger per FNSKU and flags the FNSKUs where Amazon's balance and yours disagree. With reimbursement recovery we do that work for you: we audit your uploads daily, prepare the manufacturing-cost documentation, file each claim by hand inside the 60-day window, and appeal denials. You get monthly statements of the claims filed and their outcomes.
Leviathan Recon is our self-serve inventory reconciliation software. You export your own reports from Seller Central and upload them, and Recon rebuilds your unit ledger per FNSKU, then sets it against the balance Amazon reports for that same FNSKU. Each FNSKU comes back with a status you read on screen — Matched, Over, Reimbursed, Take Action, or No Snapshot — and the rows behind the figures are there to open. It suits sellers who want their own numbers in front of them and want to work the discrepancies themselves. If you would rather hand the filing to specialists, that is our reimbursement recovery service instead.
You sign up and verify your email with the code we send. We provision your workspace by hand, so your login details arrive by email within one business day — and the 14 days start then, rather than when you submit the form. There is no credit card at any point. During the trial you upload your own Amazon reports and see your own reconciliation results, and what you find is yours to export and keep. Reimbursement recovery is a separate service and is not part of the trial.
Leviathan Recon starts with a free 14-day trial and no card on file; access afterwards is quoted on your account size and the marketplaces you sell in, and we send you the numbers before anything starts. Reimbursement recovery is commission-based — we charge only on funds we actually recover, so if we recover nothing, you pay nothing. FBA account management and product research are priced on a monthly retainer based on account size and scope. The initial audit is free with no obligation.
Yes. We actively support sellers on Amazon.com (US), Amazon.co.uk (UK), Amazon.in (India), Amazon.ca (Canada), Amazon.de and other European marketplaces, and Amazon.com.au (Australia).
Automated bulk-filing tools were designed for the old 18-month window and pre-2025 reimbursement model. They submit claims from templates, at volume, without the customised manufacturing-cost documentation current policy asks for. Leviathan Sellers files each claim by hand instead, with manufacturing-cost documentation prepared for that specific claim rather than generated from a template.
We work to Amazon's published policies. Reimbursement claims are prepared and filed by hand through Amazon's own case system, with the manufacturing-cost documentation its 2025 policy requires, and we don't use bulk-automation filing or grey-hat tools. We also hold no credentials and no account access — you export your own reports and upload them — so we cannot take any action inside your Seller Central account.
Services
See where your units went.
Fourteen days of Recon, free and with no card. Or send us your reports and we'll audit them for you.