Amazon FBA Reimbursement Audit: How to Find Money Amazon Owes You in 2026

A seller running a million-dollar Amazon business downloaded their FBA Customer Returns report for the first time in six months. Fourteen units had come back marked DAMAGED — Amazon’s responsibility, not the buyer’s. Every single one should have triggered an automatic reimbursement.

None of them did.

By the time the seller noticed, eleven of those claims had passed the sixty-day filing window. Gone. Permanently. Not because the evidence was missing — it was sitting right there in the report the entire time. Nobody looked.

That is not a rare story. According to multiple reimbursement services that audit thousands of seller accounts, the average FBA seller leaves between one and three percent of their annual revenue unclaimed every year. On a million-dollar account, that is up to thirty thousand dollars a year disappearing inside reports most sellers download once, glance at, and close.

Here is what makes this worse. Most sellers think Amazon fixed this problem. They didn’t. They automated part of it — and quietly shortened the clock on the rest.

The money is not hidden. It is ignored. And in 2026, ignoring it costs more than it ever has.

What Changed — and Why Amazon Is Counting on You Not Noticing

In late 2024, Amazon quietly made two changes to their FBA reimbursement policy. Neither one got the attention it deserved.

The first change sounds like good news. Amazon announced they would begin proactively reimbursing sellers automatically for items lost or damaged in fulfillment centers and for customer return discrepancies. Most sellers read that headline and moved on. Problem solved. Amazon’s handling it now.

They are not.

Amazon’s exact language was that “almost all” cases would be covered automatically. Almost all is not all. And the cases that slip through — a customer return marked DAMAGED that doesn’t trigger a payout, an inventory adjustment coded as misplaced with no matching reimbursement — those are now entirely on you to catch.

The second change is where it gets expensive. The manual claim window for those missed cases dropped from eighteen months to sixty days. Think about that. You used to have a year and a half to find a missing reimbursement and file a claim. Now you have two months. For fulfillment center losses — items damaged, misplaced, or disposed of in a warehouse — sixty days from the date of the event. For customer return discrepancies, sixty to one hundred twenty days after the refund date.

Miss that window and the money is gone. Not pending. Not recoverable. Gone.

Then in March 2025, Amazon changed the math. Reimbursements used to be based on the selling price of the item. Now they are based on manufacturing cost — what you paid your supplier. For a product you sell for fifty dollars that costs you fifteen to manufacture, your reimbursement went from roughly fifty dollars to roughly fifteen. That is a seventy percent cut in what Amazon pays you for losing your inventory.

If you have not updated your manufacturing costs in the Inventory Defect and Reimbursement Portal, Amazon is estimating them for you. And Amazon’s estimates tend to favor Amazon.

So here is where most sellers stand right now in 2026: shorter window, lower payouts, and an automation system that catches most cases but not all. The sellers who run monthly FBA reimbursement audits catch the gaps. The sellers who trust the automation are bleeding money they will never see.

The Three Reports Every Amazon Seller Should Be Cross-Referencing

Every unpaid reimbursement in your account can be found by cross-referencing three reports that are already sitting in your Seller Central dashboard. You do not need a subscription. You do not need a third-party tool. You need three CSV downloads and thirty minutes.

Report 1 — FBA Customer Returns
Seller Central → Reports → Fulfillment → Customer Concessions → FBA Customer Returns

This is the report most sellers glance at to check return volume and never look at again. That is a mistake. The column that matters is Disposition — it tells you exactly what happened to every returned unit and who is responsible.

Disposition Code	What It Means	Who Pays?
DAMAGED	Amazon damaged the item in handling	Amazon owes you — file a claim
CARRIER_DAMAGED	Amazon’s shipping partner damaged it	Amazon is responsible — file a claim
SELLABLE	Item came back in sellable condition	No claim — item returned to inventory
CUSTOMER_DAMAGED	Buyer damaged the product	Not claimable — buyer responsibility
DEFECTIVE	Returned as defective/unsellable	Not automatically claimable — review case by case

Here is what catches most sellers off guard. A unit can come back marked DAMAGED — meaning Amazon broke it — and if the automatic reimbursement system does not fire, nothing happens. No alert. No flag. No email. That unit just disappears from your inventory with no payout. The only way you find out is by checking this report yourself.

Report 2 — Reimbursements
Seller Central → Reports → Fulfillment → Payments → Reimbursements

Think of this as your receipt file. Every row in this report is money Amazon already paid you back. If a loss event from the Customer Returns report or the Inventory Ledger does not have a matching entry in the Reimbursements file — Amazon never paid you.

This is the report that exposes the gap. Most sellers never open it because they assume Amazon is handling everything automatically. In 2026 that assumption is costing sellers thousands of dollars every quarter.

Report 3 — Inventory Ledger (Detailed View)
Seller Central → Reports → Fulfillment → Inventory → Inventory Ledger → Detailed View → Event Type: Adjustments

This is the report that shows you everything Amazon did with your inventory behind the scenes. Every adjustment, every removal, every unit that disappeared. The Reason column is where the money hides:

Reason Code	What It Means	Claimable?
Inventory misplaced	Unit lost inside the fulfillment center	Yes — Amazon lost it
Damaged at Amazon fulfillment center	Unit damaged while in Amazon’s care	Yes — Amazon broke it
Inventory disposed of	Amazon disposed of the unit on their own	Yes — if you didn’t request it
Inventory found	Previously lost item recovered	No — already resolved
Reimbursed	Amazon already paid you	No — already resolved
Inventory disposition change	Internal reclassification	No — no loss occurred
Product redefinition transfer	SKU restructuring	No — no loss occurred

Every negative-quantity adjustment with a claimable reason code and no matching reimbursement is money Amazon owes you. Right now. In your account. Expiring.

The Cross-Reference That Finds the Money

Here is the part that an entire service industry charges twenty-five percent commission to do. The actual audit.

You are looking for one thing: FNSKUs that show up in Report 1 or Report 3 with a claimable reason — but do NOT show up in Report 2 within sixty days of the event.

That gap between what Amazon damaged or lost and what Amazon actually paid you back is your unclaimed money.

Step 1. Download all three reports covering the same date range — at least the last ninety days so you catch claims still inside the sixty-day window.

Step 2. Filter the Customer Returns report. Pull every row where Disposition is DAMAGED or CARRIER_DAMAGED. These are units Amazon or their carrier broke. Each one should have a matching reimbursement.

Step 3. Filter the Inventory Ledger. Pull every row with a negative quantity where the Reason is Inventory misplaced, Damaged at Amazon fulfillment center, or Inventory disposed of. These are units Amazon lost, broke, or threw away. Each one should have a matching reimbursement.

Step 4. Cross-reference against the Reimbursements report. For every flagged FNSKU, search for a matching entry within sixty days of the event date. Match on FNSKU and date range — not just FNSKU alone, because the same product can have multiple events.

Step 5. Everything with no match is an unpaid claim. That is the list.

This is where most sellers stop. Not because the process is hard — because it is tedious. Thousands of rows across three spreadsheets. Matching FNSKUs. Checking dates. Comparing disposition codes against payout records. Nobody wants to spend their Saturday doing this.

That is exactly why an entire category of reimbursement services exists. They download your reports, run this cross-reference, find the gaps, and file the claims. Then they keep twenty-five percent of whatever they recover. Your data. Your account. Money that was already owed to you.

Here is what changed in 2026. AI can now do this exact cross-reference.

Not approximately. Not a summary. The exact same logic — read every row, apply the rules, match FNSKUs across three files, check the date windows, flag every gap.

Claude Code running in VS Code reads all three CSV files, applies the disposition and reason code rules, cross-references against the reimbursements data, and outputs a spreadsheet of unpaid claims with claim type, FNSKU, order ID, event date, quantity, and estimated value. You teach it the rules once in a context file called CLAUDE.md. Then you run the same audit every month with a single prompt. Thirty seconds. Done.

We made a step-by-step video walking through the full setup — which reports to download, how to configure Claude Code with the rules, and the exact prompts to run each month. All three prompts are pinned in the video comments — copy, paste, run. Watch it here: Amazon Owes You Money. Stop Paying 25% to Find It

And if you connect your Amazon data through the Seller Labs MCP server, you skip the downloads entirely. Your reports pull directly into your AI workspace. One prompt. Raw data to filed claims. No spreadsheets. No folders. No manual exports.

Whether you use the free checklist below, a VA, an AI tool, or a paid service — the point is the same. This audit needs to happen every single month. Every month you skip is another sixty-day window closing on money you are owed.

How to File the Claims Once You Find Them

You have the list. Now every unpaid claim needs a case in Seller Central. Amazon processes claims faster when the evidence is specific and matches their own report data — do not submit vague requests. Give them exactly what they need.

For Customer Return Claims (DAMAGED / CARRIER_DAMAGED):
Navigate to Help → Get Support → FBA Returns Reimbursement. Enter the Order ID. In your case message include the FNSKU, the exact return date from the report, and the disposition code. Attach or reference the specific row from the FBA Customer Returns report. One case per claim — do not batch multiple returns into a single case.

For Warehouse Loss Claims (Misplaced / Damaged at FC / Disposed):
Navigate to Help → Get Support → select “My issue is not listed.” In the “What do you need help with” field, paste your case message with the FNSKU, event date, reason text exactly as it appears in the Inventory Ledger, and the quantity affected. In the reference numbers field, enter the FNSKU. Again — one case per claim.

Sample case message for a warehouse loss:

“I am requesting reimbursement for the following inventory loss. FNSKU: X001ABC1234. Event Date: 2026-02-15. Reason: Inventory misplaced (per Inventory Ledger Detailed View). Quantity: 3 units. No matching reimbursement appears in my Reimbursements report as of today. Please investigate and process the reimbursement per FBA inventory reimbursement policy.”

Clear. Specific. References Amazon’s own data. That is what gets claims processed without back-and-forth.

If you want Claude Code to generate these case messages automatically for every claim on your list, the third prompt in our video does exactly that — it reads your unpaid claims file and outputs copy-paste case text with the correct filing path for each claim type. Watch the full walkthrough here.

Free Downloadable Audit Checklist

We built a free Google Sheet that does the cross-reference for you. No formulas to write. No logic to figure out. Download it, paste your three Seller Central reports into the designated tabs, and the Unpaid Claims tab auto-highlights every FNSKU with no matching reimbursement.

What is inside:

• Pre-formatted paste tabs for all three Seller Central reports with the exact column headers Amazon uses
• Auto cross-reference formulas that flag every FNSKU with a claimable disposition or reason code and no matching payout
• Color coding — red rows are unpaid claims that need cases filed, green rows are already reimbursed
• A Days Remaining column that calculates how many days are left in the sixty-day claim window for each flagged item — so you know which claims to file first
• Copy-paste case message templates for every claim type — customer return damaged, carrier damaged, warehouse misplaced, warehouse damaged, disposed by Amazon — with the exact Seller Central filing path for each

Paste your data. See what is owed. File the claims. Keep one hundred percent.

Download the Free FBA Reimbursement Audit Checklist →

How Often Should You Run This Audit

Monthly. No exceptions.

Here is the math. With a sixty-day claim window, if you run an audit quarterly, the claims from month one are already expired by the time you look in month three. You are always behind. A monthly cadence gives you a thirty-day buffer on every claim — enough time to find it, file it, and follow up if Amazon pushes back.

The audit itself takes minutes once you have a system. The free checklist above handles the cross-reference automatically the moment you paste your data. Claude Code does it in thirty seconds with a single prompt. Even a trained VA can run the manual version in under an hour.

The sellers who are recovering what they are owed are not spending their weekends buried in spreadsheets. They are spending ten minutes, once a month, running a system they set up once.

Ten minutes a month. That is the difference between recovering every dollar Amazon owes you and permanently losing thousands a year because nobody checked.

What happens if I miss the 60-day claim window?

The claim expires permanently. Amazon will not process it regardless of how much evidence you have. There is no appeal. There is no exception. This is why monthly audits are not optional — a quarterly review guarantees some claims will already be dead before you find them.

Does Amazon’s automatic reimbursement system catch everything?

No. Amazon’s own announcement said “almost all” cases would be covered. The cases that fall through — particularly customer returns with DAMAGED or CARRIER_DAMAGED disposition codes that don’t trigger automatic payouts, and certain inventory adjustment reason codes — require manual claims. The only way to know if automation missed a case in your account is to cross-reference the Reimbursements report against the Customer Returns and Inventory Ledger yourself. If it is not in the Reimbursements file, Amazon did not pay you.

How much does the manufacturing cost change actually affect payouts?

Significantly for high-margin sellers. If your manufacturing cost is forty percent of your selling price, your reimbursement per unit dropped by roughly sixty percent compared to the old policy. A product you sell for fifty dollars that costs fifteen to manufacture went from a roughly fifty dollar reimbursement to a roughly fifteen dollar reimbursement. You can partially mitigate this by entering accurate manufacturing costs in the Inventory Defect and Reimbursement Portal — if you do not, Amazon estimates your costs, and their estimates consistently lean lower than actual.

Can AI actually run this audit?

Yes — and it is not the vague “AI can help with everything” claim you see everywhere. This is a specific, structured cross-reference across three CSV files with defined rules. Claude Code reads the files, applies the disposition and reason code rules, matches FNSKUs across reports within date windows, and outputs a spreadsheet of unpaid claims ready to file. The setup takes one session — you define the rules in a CLAUDE.md context file. After that, every monthly audit is a single prompt. We made a full video walking through every step with the exact prompts you need — watch it here.

Should I pay a reimbursement service to do this for me?

That depends on your alternative. Most services charge fifteen to twenty-five percent of recovered funds as commission. If the choice is between paying twenty-five percent and doing nothing — pay the twenty-five percent. Some money recovered is better than all of it lost. But the audit itself is not complex work. It is tedious work. Downloading three reports, matching FNSKUs, checking dates. That is exactly the kind of work that AI, automation, and even a well-instructed VA have eliminated. The question every seller should be asking in 2026 is not “which service is cheapest” — it is “why am I paying a percentage of my own money for work a prompt can do?”

Related Reads:

• Top 10 Strategies for Amazon Sellers in 2026 — The playbook for staying profitable when fees rise, margins shrink, and AI changes everything.
• Amazon Fee Increases 2026: How to Protect Profit Before It’s Too Late — New FBA fees are eating margins. Unclaimed reimbursements make it worse.
• AI Gap for Amazon Sellers: 5 Ways to Close It in 2026 — How sellers are using AI to analyze their actual Seller Central data and make faster decisions.
• Vibe Coding for Amazon Sellers: Replace Your Dev Team With AI — How sellers are building AI automations in plain English — the same approach used in the reimbursement audit prompts.
• Amazon Ads MCP Server: What Sellers Need to Know in 2026 — How MCP servers connect your Amazon data directly to AI for real-time analysis.

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