Audit your auditor: are you paying commission on Amazon's own corrections?

The dispute wins looked fine on paper. Quarter after quarter, your recovery service sends a report — shortages recovered, chargebacks disputed, numbers in green. Then your MD asks a simple question: where is it in the P&L?

The margin improved. But only by a fraction of what the recovery report implied. Most Heads of Amazon I speak to have felt this gap and not been able to name it. The gap has a name: Amazon recovery commission billed on corrections Amazon made on its own. This article names it.

#How Amazon shortage claims actually settle

When Amazon receives a delivery and detects a shortage, the claim doesn't settle immediately. Amazon iteratively matches stock received against other purchase orders — a reconciliation process with tens of sequential steps, running automatically without any input from you or your recovery service. This process is called Smart Match.

Most of that settlement happens within the first 35 days after your invoice due date.

Smart Match typically resolves more than half of the initial shortage amount — often significantly more. Two of our current clients have Smart Match rates of 64% and 62%. Amazon corrected nearly two-thirds of their initial shortage claims before any dispute was filed.

This is why Amazon's own guidance tells vendors to wait 35 days before disputing a shortage. The window exists because Smart Match needs time to run. Amazon publishes that guidance knowing what the process does.

Here is what that means in practice. If Amazon raises an initial shortage of £100,000, Smart Match will typically resolve £55,000–£65,000 of it without any intervention. The remaining amount — the genuinely contested portion — is what a dispute needs to address. That is the real job.

#What the filing timing data actually shows

Most recovery services file disputes immediately — or as close to immediately as their systems allow. Some market their speed as a feature. "File as it arrives." "Turn errors into claims while the window is still open." Fast is their product.

The largest recovery network serving Amazon vendors published an analysis of their dispute results. Their finding: 99% of what they count as successful recoveries were filed within 40 days of invoice due date. Filing early, they concluded, produces the best outcomes.

Here is what that data actually shows.

Their "optimal" window — days 0 to 40 after invoice due — sits directly inside the Smart Match window. Amazon's iterative reconciliation is still running during most of that period. The money that comes back is largely Amazon's own corrections. The recovery service filed a dispute. Amazon ran Smart Match. Money came back. The recovery service claimed credit and charged commission.

After the Smart Match window closes — after day 40 — their success rate drops to 0–5%. That is not a finding. That is a confession.

The 0–5% figure is the actual dispute win rate on genuinely contested shortages: claims where Amazon did not auto-correct the amount and a real argument had to be made. That number reflects what recovery services actually do. The 99% reflects what Amazon's algorithm does — billed at 25–30% commission.

#The "feed Smart Match" claim

When recovery services are pressed on their filing timing, some offer a technical justification: filing early "feeds" Amazon's Smart Match algorithm. Submit dispute data early — ASINs, unit counts, external IDs — and you give Smart Match the inputs it needs. Earlier filing, they argue, means better outcomes.

This explanation is wrong.

Dispute submissions are not an input to Smart Match. Amazon's own guidance says wait 35 days before filing — because that's how long Smart Match takes to run. Filing before it runs doesn't help the algorithm. It helps your auditor's invoice.

I worked directly with Amazon's FinOps team on enhancements to the auto-match and Smart Match logic. Smart Match runs on Amazon's internal data. It does not read dispute filings. It does not know whether you filed on day one or day forty. The money returns because Amazon's reconciliation resolved the discrepancy — not because a dispute triggered it.

#What you're actually paying for

Recovery services typically charge a commission on gross recovery — a percentage of every pound returned to your account, regardless of why it came back. Rates vary, but 25–30% is common. There is rarely a carve-out for what Amazon was correcting anyway.

That structure creates a direct incentive to file before Smart Match settles. It maximises the gross recovery figure. It is not what produces the best outcome for your business — it is what produces the largest invoice for your recovery service. The commission is the double whammy: they took credit for Amazon's own corrections, then charged you for it.

There is a transparency problem alongside the incentive problem. Most recovery services report a wins total: a headline figure of recovered shortages and chargebacks. What that number rarely shows is how much was Amazon correcting its own figures versus how much your recovery service actually won in dispute. You cannot read the difference from the report.

#The two questions to ask your recovery service

Two questions will tell you where your recovery service stands.

1. How many days after invoice due do you wait before filing a dispute — and why? The answer exposes the strategy. A recovery service that files in the first two to three weeks is filing while Smart Match is still running.
2. *What is your dispute win rate on shortages filed after the Smart Match window has closed?* This is the number that reflects genuine contest. If they cannot give it to you separately, they are not tracking it. That is an answer in itself.

The quality of a dispute filing determines the outcome — systematically, not occasionally. If the arguments going into Amazon's dispute system are weak, the results coming out will reflect that, and your recovery rate will flatline regardless of how many disputes your recovery service files. This is the structural reason a strong recovery report doesn't always become margin.

You can see this for yourself. Open any shortage invoice dispute your recovery service has filed in Vendor Central and read the Dispute Justification Summary. Here is a verbatim submission from a leading recovery service:

PACMAN's Dispute Justification Summary gives full visibility of every step — from when an item is ordered to the moment you're paid. To see the maths — what your recovery service's commission looks like when you strip out Amazon's own corrections — run the numbers in our calculator.

(The one exception to the early-filing argument is Amazon's Receive Variance Dashboard — recently launched at limited scale for UK GSCOP and French suppliers, where Amazon itself invites early input on specific flagged shortages. That is a different mechanism entirely. Read about it here.)

#A different starting point

PACMAN is built differently. It's an order-to-cash (O2C) AI layer — not merely a recovery tool. It connects to your ERP, WMS, EDI and carrier systems alongside Amazon Vendor Central, Carrier Central and Amazon Logistics. Our AI models run continuously, executing hundreds of cross-system checks, building and validating 48+ hypotheses, and assembling a full proof case that traces exactly what happened to every line. The dispute case is water-tight. The recoveries are incremental — on top of what Amazon corrects automatically, not instead of it.

The financial impact shows in your P&L. Not just your recovery report.