Weight and dimension fee overcharge: what to do, step by step

TL;DRA weight and dimension fee overcharge on Amazon UK happens when Amazon's fulfilment systems record measurements for your product that are larger or heavier than the actual unit, and then charge FBA fees based on those incorrect figures. The overcharge is recoverable. The path runs through a measurement dispute, then a reimbursement claim – and the result depends on how precisely you document each step.

Every week the overcharge keeps running, the gap between what you should be paying and what Amazon takes from your disbursement grows. For sellers moving volume, even a small discrepancy per unit compounds across thousands of shipments into a sum that genuinely changes a quarter's cash position. The money is held in effect – extracted from the disbursement before you ever see it – while inventory restocking bills and advertising invoices keep arriving on schedule.

This guide walks through the exact procedural sequence: identifying the overcharge, building the measurement evidence, filing and escalating the dispute, and deciding when to push further. It also covers where the process most often stalls and what can still be done at each stage.

What is a weight and dimension fee overcharge on Amazon UK?

Amazon UK calculates FBA fulfilment fees using the dimensional measurements and unit weight it holds on record for each ASIN in its fulfilment network. When those recorded figures are wrong, every unit processed at that size is billed at a higher rate than the correct measurement would justify.

The error typically originates in one of three places. Amazon's own measurement systems – the cubiscan scanners used at fulfilment centres – occasionally record incorrect values, particularly when packaging varies across shipments or when a product is measured in a polybag or with dunnage that should not be included. Amazon may also carry forward stale measurements from an earlier product version or a different variation, without re-measuring when packaging changes. A third source is data entry: the product detail page may contain figures entered at the time of listing that were never verified against a physical unit.

The financial consequence is direct. FBA fees for standard and oversize units in the UK are tiered by weight and the longest, median, and shortest dimensions. Moving from a lower size tier to a higher one – even by a centimetre or a fraction of a kilogram – can increase the per-unit fee materially. When in matters we handle the recorded length exceeds the actual longest side by more than five centimetres, the unit often tips into the next tier entirely.

A weight and dimension fee overcharge is distinct from other FBA reimbursement claims – lost inventory, disposal errors, or removal discrepancies. This is not Amazon losing your stock. It is Amazon applying a fee formula to incorrect inputs, producing an incorrect output, and deducting the difference from your disbursement on every qualifying sale. The disbursement hold is not an account suspension event; the account may be entirely active. The money is simply taken at the wrong rate each time a unit ships.

Step 1: Verify the discrepancy before filing anything

The first step is to confirm, with your own measurements, that a genuine discrepancy exists between Amazon's recorded dimensions and the physical product.

Pull the ASIN's current recorded measurements from Seller Central. In the UK marketplace, the fee-applicable measurements are visible in the FBA fee preview tool within Seller Central's "Manage Inventory" section, and through the fee detail in individual transaction reports. Note the length, width, height, and unit weight as Amazon has them. Note also the fee tier Amazon is applying.

Then measure and weigh the actual unit as it would be processed by Amazon – in its retail packaging, without additional dunnage, but in any polybag if Amazon's programme requires one for that category. Use a calibrated scale and a rigid measuring tape or calipers. Record the longest side, the second-longest side, and the shortest side. Weigh to at least one decimal place in kilograms.

The comparison matters most at tier boundaries. If Amazon records a unit as 46 cm on the longest dimension but the actual measurement is 40 cm, the financial effect depends entirely on where those two figures fall relative to the size band cut-offs. Calculate the correct fee tier using the current Amazon UK fee schedule and compare it to what is currently being charged. That difference, multiplied across recent fulfilled units, is your recoverable overcharge estimate.

Document everything at this stage. Photograph the unit on a flat surface with a ruler in frame. Photograph the scale reading. Save the Seller Central screenshot of the recorded measurements alongside the transaction reports showing the fee charged per unit. This evidence set is the foundation of every later step. A claim filed without it will be queried or rejected at the first review.

Step 2: Use the Seller Central measurement dispute path

Amazon UK's standard route for a measurement dispute is a re-measurement request submitted through Seller Central, which asks Amazon to physically re-measure a unit from your stock currently held in an Amazon fulfilment centre.

To initiate this, navigate to the relevant ASIN in Seller Central and locate the "FBA Product Size Tier and Weight" section. The precise menu path shifts with Seller Central interface updates, but the function is consistently available for ASINs with FBA inventory. Submit the re-measurement request. Amazon will take a unit from its fulfilment centre, run it through the cubiscan system again, and return the result – typically within several weeks, though in our experience the timescale varies and queues at busy periods can extend it.

If the re-measurement confirms your figures – that is, Amazon's new measurement is materially lower than the previously recorded value – Amazon should automatically adjust the recorded dimensions for that ASIN going forward. The fee going forward will then be calculated correctly. But this step does not automatically trigger a reimbursement for historical overcharges already deducted from past disbursements. That requires a separate claim.

If the re-measurement comes back unchanged or shows figures you still believe are wrong, you have two choices: accept the result and end the process, or challenge the re-measurement with your own documented evidence. In the matters we handle, a re-measurement that conflicts with careful physical measurements of the actual product is worth challenging. Amazon's cubiscan equipment is reliable but not infallible, and the unit selected for re-measurement may itself have a packaging anomaly.

Where you choose to challenge, the mechanism is a Seller Support case, filed with your full evidence set: photographs, calibrated measurements, and the specific discrepancy calculation. Frame the case around the physical evidence, not around a general complaint. "The re-measurement returned 46 cm on the longest dimension; our calibrated physical measurement of the same SKU is 40 cm as shown in the attached photographs" is the right framing. "Amazon measured it wrong" is not.

Step 3: File the reimbursement claim for historical overcharges

Correcting the measurement going forward recovers the prospective fee. The historical overcharge – every unit shipped at the wrong fee rate before the correction – requires a separate reimbursement claim.

The starting point is your transaction-level fee data. Download the "FBA Fee Preview" report and the "Payments" detail reports from Seller Central covering the period during which the incorrect measurements were on record. Cross-reference these with your physical measurement evidence to calculate the per-unit overcharge and the total across the relevant period. This is the number you will be claiming.

Amazon's reimbursement claims process for fee overcharges runs through Seller Support, not through the standard FBA reimbursement portal (which is designed for lost and damaged inventory). Open a case explicitly referencing "FBA fee overcharge due to incorrect measurement recording," attach your calculation, and attach the evidence. The case handler will review the claim against the Amazon internal measurement record and, if the discrepancy is confirmed, raise a credit to your account.

The realistic lookback period for these claims is a significant practical constraint. Amazon does not commit indefinitely to historical adjustments, and in practice the recoverable window is shorter than many sellers expect. File as soon as the measurement correction is confirmed. Delay erodes recoverable value. If the claim has been open without a substantive response for more than a few weeks, escalate it – either within the case thread or by opening a separate escalation through the account health or executive-relations pathways.

For a fuller picture of how disbursement holds and reimbursement mechanics interact across different claim types, the frozen funds recovery guide for Amazon sellers sets out the broader landscape of what can be recovered, and how.

Step 4: Escalate when the standard process stalls

The measurement dispute and reimbursement claim paths work as designed for clear-cut cases. They stall, in our experience, in three situations: where the quantum of the claim is large enough to require internal Amazon review beyond the standard support tier; where the ASIN has a history of multiple measurement records that produce conflicting data; and where the Seller Support handler closes the case as resolved when the seller's underlying point was never addressed.

When a case closes without resolution, reopen it – don't start a new one. Reference the previous case number in the reopen and be explicit about what was not addressed. The case history is Amazon's internal record; breaking the thread loses the escalation path.

If the Seller Support tier cannot resolve the matter, Amazon UK has several escalation routes. The executive-relations pathway – accessible through the case correspondence by requesting escalation to a senior specialist or account manager – bypasses the first-line support queue. Sellers enrolled in the Amazon UK Selling Partner Support program may have a dedicated account manager who can facilitate this more directly. Not all sellers have this access, particularly at lower GMV levels.

An alternative escalation is the Amazon UK Marketplaces complaint mechanism, available under the Platform-to-Business (P2B) Regulation, which requires Amazon to provide a statement of reasons for decisions affecting sellers and to operate an internal complaint-handling system. A formal P2B internal complaint is a distinct procedural step from a Seller Support case and can produce a different tier of review. We regularly use this route where standard support escalation has reached a ceiling.

Sellers facing a large overcharge claim that has stalled, or who have exhausted the standard Seller Support routes, should also consider whether the dispute-resolution terms in the Amazon Business Solutions Agreement (BSA) open further options. The BSA route for UK sellers is a point we check early in any matter where the overcharge is material. For sellers who have also encountered a removal order discrepancy alongside the fee dispute, the removal order discrepancy step-by-step guide covers the separate procedural path for that claim.

Where this process goes wrong

The measurement dispute and reimbursement claim path is navigable, but sellers handling it alone run into the same set of problems repeatedly. Understanding them reduces the chance of foreclosing options unnecessarily.

The most common error is filing the reimbursement claim before the measurement correction is confirmed. A claim filed while Amazon still holds the incorrect measurement on record will be reviewed against Amazon's own (incorrect) data and is very likely to be closed without credit. Measurement correction has to precede or accompany the historical claim, not follow it.

The second common error is insufficient documentation. A case opened with "I measured the product and Amazon is wrong" without photographic evidence, a calibrated measurement note, and a calculated discrepancy figure gives the case handler nothing to work with. Amazon's internal review process needs structured, verifiable evidence. The standard is closer to a supplier audit than a customer complaint.

Third: accepting an adverse re-measurement result without checking whether the unit Amazon used was actually representative. If Amazon's re-measurement returns a larger figure than your physical measurement, and you have photographic evidence of your measurement, the result is worth querying. It is not necessary to accept a re-measurement on faith.

Fourth: missing the effective lookback window. Amazon's willingness to reimburse historical overcharges does not extend indefinitely backward. We see sellers approach this process months or years after the overcharge started, having accumulated a large theoretical claim, only to find that the recoverable portion is a fraction of the total because of the applicable lookback constraints. Early action on a confirmed measurement discrepancy is materially better than late action on a large one.

One further point worth addressing directly: the belief that overcharged funds, once extracted from a disbursement, are gone for good. That is a common assumption in the seller community, and it is not accurate. The path is not simple, and it requires evidence and persistence, but the funds are not written off by Amazon as unclaimed. They remain an active liability in the dispute, and the reimbursement mechanism exists precisely to resolve it.

A home-goods FBA seller on Amazon UK (fall 2025) came to us after identifying what appeared to be a significant overcharge on a high-volume ASIN with packaging that had changed six months earlier. Amazon's recorded measurements still reflected the old, larger packaging dimensions. We verified the discrepancy against physical samples, filed a structured re-measurement request with supporting evidence, and followed it with a historical reimbursement claim once the correction was confirmed. The claim resolved through the standard Seller Support process at the escalated tier, and a credit was applied to the account within the disbursement cycle.

If a first claim came back rejected or was closed without resolution, a second read can identify the specific reason it failed and whether anything is still open. To have us review what happened with your claim, email info@tutamenlaw.com.

Your decision points and trade-offs at each stage

Not every measurement dispute is worth pursuing all the way to escalation, and the decision of when to invest further effort is a genuine trade-off that deserves an honest answer.

At the re-measurement stage, the question is whether the cost of preparing a well-evidenced challenge is justified by the quantum recoverable. For a high-volume ASIN with a large per-unit discrepancy, the answer is almost always yes. For a low-volume ASIN with a small discrepancy, the internal effort may exceed the likely recovery. The calculation changes if the ASIN is expected to scale: correcting the measurement going forward has a multiplier effect on future disbursements.

If the notice from Amazon – whether a case closure or a re-measurement result – uses wording that surprises you, the precise language matters. "We have re-measured and confirmed our records" points to a re-measurement challenge. "The claim falls outside our reimbursement policy" points to a policy argument about claim eligibility, which is a different dispute. "Your ASIN does not currently have FBA inventory available for re-measurement" points to a process issue, not a substantive rejection, and is resolved by ensuring sufficient inventory is present in the UK network.

On the BSA and P2B escalation routes: these are not first steps. They become relevant when the standard pathway has genuinely stalled and the claim quantum justifies the additional procedural effort. In matters we handle where the overcharge across a 12-month period represents a material share of the seller's UK disbursement total, the P2B internal complaint and BSA dispute mechanism are tools worth using. For smaller claims, the standard Seller Support escalation is usually sufficient.

For sellers who also hold Walmart Marketplace inventory, it is worth noting that measurement-related fulfilment fee discrepancies arise on that platform as well, with a different procedural path. The Walmart disposed inventory claim guide covers the reimbursement mechanics on that surface, including where the process overlaps with fee recovery logic.

Related areas

• Frozen Funds & Recovery – disbursement holds, FBA reimbursement, and withheld balances on Amazon
• Amazon Account Reinstatement – deactivation, Plan of Action, and account restoration

Frequently asked questions

How long does resolving weight and dimension fee overcharge usually take on Amazon UK?

The timeline varies considerably depending on how the claim is handled and how quickly Amazon processes each stage. The re-measurement request alone typically takes several weeks. If the result confirms the discrepancy and no challenge is needed, the historical reimbursement claim can move through Seller Support in a comparable period. Where escalation is needed – because the re-measurement is disputed or the reimbursement claim has stalled – the process extends further, and the total timeline from first filing to credited disbursement can run to a number of months. Filing with complete, structured evidence at the outset tends to reduce delays at each review stage.

What are the main risks if I handle weight and dimension fee overcharge alone?

The most significant risk is filing out of sequence – specifically, claiming historical reimbursement before the measurement correction is confirmed, which gives Amazon grounds to reject the claim on its own records. A close second is insufficient documentation, which leads to case closures without credit that can be difficult to reopen on the same grounds. Sellers also frequently accept an adverse re-measurement result without querying it, or miss the effective lookback window by delaying the claim after the discrepancy is identified. Each of these errors is avoidable with careful preparation, but they are common enough that in the matters we handle we treat the evidence and sequencing check as the first priority before any filing.

Do I need a lawyer for weight and dimension fee overcharge?

For a modest, clear-cut overcharge on a single ASIN with a straightforward re-measurement outcome, a well-prepared seller can work through the Seller Support process without legal assistance. A lawyer adds value where the claim is large, where the standard escalation path has stalled, where the BSA or P2B routes are needed, or where the seller is also dealing with a disbursement hold or account issue that intersects with the fee dispute. Attorney involvement also matters for the claim framing: a structured, evidence-led submission reduces the chance of procedural rejection and keeps options open if escalation becomes necessary later.

About Tutamen

Tutamen is an independent law firm for online marketplace sellers. We represent Amazon, Walmart, Etsy and eBay sellers in account deactivations, frozen-funds recovery, intellectual-property disputes, arbitration and Notices of Dispute, and US federal Schedule A defense, plus EU marketplace regulation. Our work is attorney-led and confidential, with fees quoted up front. We act for founders, brand owners and in-house teams who need a specialist for a marketplace dispute. Our fee structure for reimbursement and funds-recovery matters is typically fixed, quoted after a short initial review, so you know the cost before committing. To discuss your situation, email info@tutamenlaw.com.

Authored by Helena R. Voss, Partner – Reinstatement & Funds Recovery, Tutamen. Published June 30, 2026.

Disclaimer: This article is general information, not legal advice, and does not create an attorney-client relationship. Marketplace policies and the law change, and every account and case is different. For advice on your situation, contact Tutamen at info@tutamenlaw.com.