Weight and dimension fee overcharge: the response checklist

A seller's disbursement settles lower than expected. The FBA fee line shows charges that don't match the product's actual size or weight. On Amazon UK, this is not a rare edge case – it is a recurring billing issue that quietly compounds across hundreds of shipments before most sellers notice it. The money has already left the account. The question is whether it can come back.

TL;DRA weight and dimension fee overcharge on Amazon UK occurs when the fulfilment fee applied to a unit is calculated against Amazon's recorded measurements rather than the product's actual measurements – and the two diverge. The overcharge is recoverable through a structured reimbursement process, but the window to identify, document, and file is finite, and weak submissions are routinely closed without credit. Acting promptly and in the right sequence is what determines whether the claim succeeds.

This checklist works through the response in five phases: confirming the overcharge, gathering the evidence, filing correctly, managing the wait, and deciding what to do if the first attempt is rejected. Each phase has concrete checks you can act on immediately, and the decision points are flagged where they arise.

Phase 1 – What weight and dimension fee overcharge actually is, and how to confirm it

Amazon UK calculates FBA fulfilment fees from the measurements it holds on file for each ASIN – not necessarily from the measurements you submitted, and not always from a recent re-measure. If Amazon's recorded weight or one or more dimensions exceeds the actual product measurement, every unit sold under that ASIN is billed at the wrong rate. The overcharge is systemic for as long as the incorrect record persists.

This is distinct from a one-time billing error. Because fees are applied automatically at each shipment event, a single measurement discrepancy can generate overcharges across a significant volume of transactions over weeks or months. In matters we handle, the total overcharge is often larger than the seller first estimates once the full transaction history is pulled.

What causes the divergence? Amazon re-measures units that pass through its fulfilment centres, and those measurements enter the system. The process is not infallible. A unit measured in awkward orientation, or one product confused with another on a shared listing, can produce a recorded dimension that is genuinely wrong. The seller's own submission data is not automatically authoritative once Amazon's warehouse scan overrides it.

Phase 1 checks:

Download your FBA fee transaction report from Seller Central for the affected ASIN over the full review period (pull the maximum available date range first).
Identify the fee tier that was applied – Amazon UK publishes size tier thresholds and the corresponding fee schedule; locate which tier your ASIN was placed in and which tier it should have been in based on the true measurements.
Cross-reference Amazon's recorded dimensions in the Manage FBA Inventory view: check "Product Size Tier" and the displayed weight and dimension values against your own verified measurements.
Physically measure and weigh a production unit. Use the same measurement convention Amazon uses: longest side, median side, shortest side, and unit weight including packaging. Record these measurements and retain the physical unit.
Calculate the fee differential per unit (the gap between the fee charged and the fee that should have applied) and multiply by the transaction count. This is your rough claim value before any Amazon deductions.
Confirm that the ASIN has not had a legitimate re-tier event (a product redesign, new packaging) that would justify the higher measurement. If there was a redesign, the claim period is limited to the period before the redesign.

At the end of Phase 1 you should know: whether an overcharge exists, the approximate amount, and the period it covers. If the discrepancy is within measurement rounding tolerance and the fee tier is unchanged, there is no viable claim. If there is a clear tier mismatch, proceed.

Phase 2 – What evidence do you actually need to file?

A credible weight and dimension overcharge claim rests on documented proof that your actual measurements fall below the threshold Amazon used to place the ASIN in its current fee tier – and that the measurements are reproducible and specific to the unit as sold. A bare assertion that the product "should be" smaller is not enough.

Amazon UK's reimbursement process requires evidence that is both product-specific and measurement-specific. In our practice, claims that fail at the evidence stage almost always fail for one of two reasons: the measurements provided are generic (taken from a design file rather than a physical unit), or the evidence contradicts itself (a measurement submitted to Amazon at listing differs materially from the measurement now claimed).

Phase 2 checks:

Physical measurement record: document the unit's three dimensions and weight using a calibrated tape measure and a calibrated postal or parcel scale. Photograph the measurement in progress – the unit on the scale, the tape across the relevant axis. Date-stamp the photographs.
Gather your original product specification sheet or packaging brief. This is supporting context, not primary evidence, but it corroborates the physical measurement where the two align.
Pull the FBA shipment records for the relevant ASINs and match them to the fee transaction report. You are building a table: shipment event → fee applied → fee that should have applied → difference.
If you have previous FBA measurement notifications from Amazon – emails or Seller Central notifications confirming a re-measure – locate and preserve them. They are directly relevant to when the incorrect measurement entered the system.
Check whether a third-party measurement service (Amazon's own cubiscan data, for instance) has ever returned results you can reference. Where Amazon's own measurement scan data is available in the case history, it can support or undermine your position.
Prepare a clean, chronological summary: the ASIN, the date the overcharge began, the evidence of the correct measurement, the fee tier the unit actually qualifies for, and the total overcharge calculated at that tier differential.

Decision point: if your measurements are close to the tier boundary – within a few millimetres or grams – assess realistically whether measurement variability across units could place some shipments legitimately in the higher tier. Claims built on borderline measurements face greater resistance and may be partially credited rather than fully.

For a broader map of how Amazon UK holds and releases funds across different reimbursement categories, the frozen funds recovery guide for sellers covers the full disbursement and claim landscape in detail.

Phase 3 – Filing the reimbursement claim correctly

The filing step is where many sellers lose claims they should win. Amazon UK's Seller Support handles FBA reimbursement requests, but the case routing, the reviewer's frame of reference, and the documentation threshold all vary depending on how the request is framed. A vague or poorly evidenced first filing often results in a closure that is harder to reopen than if the case had been filed correctly from the start.

This is the core tension in a dimension fee overcharge claim: the seller's instinct is to contact Seller Support quickly and explain the problem. Amazon's system is designed to process standardised requests efficiently. The two approaches produce different outcomes.

Phase 3 checks:

Open a case in Seller Central under the FBA reimbursement path. The specific entry point matters – route via FBA > Reimbursement, not the general performance or payments path.
State clearly in the first message: the ASIN, the fee tier Amazon applied, the fee tier the ASIN should be in based on actual measurements, and the date range of the overcharge. Lead with the specific discrepancy, not with a complaint about the amount charged.
Attach the measurement photographs and the fee differential calculation in the initial submission. Do not wait to be asked for evidence. Cases that open without evidence are more likely to be closed with a templated response.
Request confirmation of Amazon's recorded dimensions for the ASIN as part of the same case. This creates a written record of what Amazon holds on file – essential if you need to escalate.
Note the case number and the date of every response. Amazon UK's internal escalation paths require reference to prior case numbers.
If Seller Support asks for the same information you already provided, resend it in a structured format and note that the information was in the original submission. Repetition is common; it does not mean the case is progressing badly.

Realistic timeline: first-level Seller Support responses on FBA reimbursement cases typically come within several business days, though the pace of substantive review is slower. Do not treat a quick acknowledgement as a substantive decision.

A micro-case from our practice: a kitchenware FBA seller on Amazon UK (winter 2025) had been charged at the large parcel tier for a product that consistently measured within the standard parcel tier. The seller had submitted a Seller Support case but framed it as a general billing complaint, without attaching measurements. The case was closed after one exchange. We reopened it with a structured submission – physical measurement record, fee differential table, and a request for Amazon's cubiscan data on the ASIN – and the case progressed to a substantive review. The outcome was a credit against future disbursements across the affected period.

Phase 4 – Managing the wait and tracking disbursement impact

A pending reimbursement claim does not pause the rest of your account's financial cycle. Disbursements continue on their usual schedule, FBA fees continue to apply to ongoing shipments at the (potentially still-wrong) rate, and the overcharge accumulates if the measurement record has not yet been corrected. Passive waiting costs money.

What happens to the underlying measurement record during a claim? Amazon may or may not correct its recorded dimensions as part of the reimbursement process. In some cases, the measurement is corrected and future fees normalise. In others, the reimbursement is credited but the incorrect measurement persists, and the overcharge resumes on future shipments. You need to track both.

Phase 4 checks:

While the case is open, re-run your FBA fee transaction report weekly for the affected ASIN. Check whether the fee tier applied to new shipments has changed. If it has not, the measurement record has not been corrected yet.
Check the Payments > Transaction view for any credit lines associated with your case number. Reimbursements, when granted, typically appear as a credit against the disbursement ledger rather than a separate payment.
If more than two weeks pass without a substantive response (not an acknowledgement), submit a follow-up referencing the original case number and asking for an update on the review status.
Monitor your reserve balance during this period. If your account carries a rolling reserve, a reimbursement credit may affect the reserve calculation. Understand the net disbursement impact, not just the gross credit.
Keep a running tally of overcharges that accumulate on new shipments during the claim period. These can be added to the claim or submitted as a supplementary case once the measurement record is corrected.

The removal order discrepancy guide is relevant here if you are also managing inventory disputes alongside the fee overcharge – both involve Amazon's internal record-keeping and the same reimbursement infrastructure.

Phase 5 – If the first claim is rejected: escalation and realistic options

A first rejection is not a final answer. Amazon UK's reimbursement process has multiple tiers, and the reason the first case failed determines what is still open. Not all rejection reasons are equally reversible, and the decision about whether to escalate – and how – is a real trade-off.

The most common rejection reasons in weight and dimension claims are: the evidence submitted did not meet the documentation standard; the ASIN was found to be legitimately in the higher tier; or the case was closed on a procedural ground (filed via the wrong path, case abandoned due to no seller response within the response window). Each has a different escalation route.

Phase 5 checks:

Read the rejection message carefully and identify the stated reason. If no reason is given, request one in writing before deciding on escalation.
If the rejection cites insufficient evidence, determine what evidence was missing and whether you can now provide it. A supplementary submission with the corrected evidence set is a standard next step and does not require the same case to be reopened – a new case referencing the prior case number is appropriate.
If the rejection states the ASIN's measurements match Amazon's records, request the specific dimensions and weight Amazon holds on file. Compare them to your physical measurement. If there is a discrepancy, that discrepancy is itself the next piece of evidence.
If you believe Amazon's measurement record is wrong, you can request a re-measure through the FBA Inventory Placement programme or by submitting a product measurement request in Seller Central. A new official measurement that confirms your figures supersedes the old record and substantially strengthens the claim.
For claims involving a material sum, assess whether the cost of further pursuit – your time, and potentially professional fees – is proportionate to the likely credit. Some claims are worth pressing to escalation; others are better closed and the measurement corrected to prevent future overcharges.
If the claim involves frozen funds or is part of a broader disbursement hold, the legal options available under the BSA's dispute-resolution mechanism deserve separate analysis. The path depends on the BSA version that applies to the account, which we check first.

A second micro-case: a health-and-beauty supplement seller on Amazon UK (spring 2026) had two separate overcharge claims rejected at first level. Both rejections cited "measurements confirmed by warehouse scan." We requested the specific scan data, identified that one ASIN's scan had confused two co-mingled SKUs (a known comingling issue), and resubmitted with a product separation request and a new measurement submission. The measurement record was corrected on that ASIN, and the reimbursement for the overcharge period was credited in full. The second ASIN's claim remained unresolved – the scan data and physical measurements were within tolerance and the claim was closed.

That second closure is the realistic outcome in a genuine borderline case. Knowing when a claim is worth pressing and when to redirect energy toward correcting the measurement going forward – rather than recovering past overcharges – is a real decision point, and one that depends on the specific facts of the account.

For sellers dealing with the broader question of what happens to inventory that was disposed of rather than returned, the disposed inventory claim guide explains the overlapping reimbursement questions that often arise alongside fee overcharge disputes.

When to involve a lawyer: the decision matrix

Many weight and dimension overcharge claims are resolved through Seller Support without professional involvement. The structured approach in Phases 1 through 5 above covers what a well-organised seller can do directly. But the trade-off shifts when the claim value is material, when multiple rejections have stacked up, or when the overcharge is part of a broader account or disbursement problem.

A common myth among sellers is that held or disputed funds are simply gone once the account is deactivated or the claim is closed. That is not accurate. Closed cases can be reopened with new evidence. BSA dispute-resolution mechanisms remain available. Reimbursement claims survive account deactivation in many circumstances. The myth costs sellers money they are owed.

If the overcharge total is small and the account is otherwise healthy, self-management through Phases 1 to 5 is reasonable. If the claim has been rejected twice and involves a significant sum, or if the overcharge is connected to a disbursement hold or account deactivation, the realistic path is to have a lawyer map the specific options – what is still open, what the evidence needs to show, and whether the BSA dispute-resolution path is appropriate.

In matters we handle on Amazon UK, we review the deactivation notice or rejection record, map every held balance and reserve, and press the disbursement and reimbursement claims that remain viable. Fees are fixed and quoted up front after a short review of the account history.

Decision matrix in brief: if the Amazon-recorded dimension places your ASIN one tier above its correct tier, and the overcharge covers more than a few months of transactions, and Seller Support has closed the case without substantive engagement with the evidence – that is the profile of a matter that benefits from professional preparation before the next filing. If the overcharge is within one fee tier and the claim value is modest, self-management is proportionate.

Related areas

Frozen Funds & Recovery – recovering held balances, reserves, and FBA reimbursements across Amazon UK and other surfaces
Frozen funds recovery: the complete guide for sellers – end-to-end overview of the disbursement hold and reimbursement process

If a first appeal or filing already came back rejected, a second read can find the specific reason it failed and what, if anything, is still open. To discuss a rejected overcharge claim or a broader disbursement dispute, contact Tutamen at info@tutamenlaw.com.

Frequently asked questions

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

Resolution timelines vary considerably depending on the complexity of the evidence and the number of review levels involved. A well-evidenced first filing may receive a substantive decision within several weeks. Cases that require escalation, a re-measure request, or a supplementary submission typically take longer – often several months from the initial filing to a final credit or closure. Delays in Seller Support responses extend the timeline further. Acting promptly and submitting complete evidence at the outset is the most reliable way to compress the process.

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

The primary risks are filing via the wrong Seller Central path, submitting evidence that fails Amazon's documentation standard, and accepting a first rejection as final when the claim remains open. A procedural closure is harder to reopen than a claim that was never filed. Sellers who file without a fee differential calculation or physical measurement record often receive a templated rejection that offers no guidance on what was missing. A second common risk is correcting the past claim but failing to confirm that the measurement record has been updated – allowing the overcharge to continue on future shipments.

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

Not always. A single-ASIN overcharge with a modest claim value is often manageable through Seller Support with careful preparation. Professional involvement becomes valuable when the claim has been rejected twice or more, when the total overcharge is material, when the overcharge is connected to a broader disbursement hold or account deactivation, or when the BSA dispute-resolution mechanism is under consideration. The cost of involvement should be weighed against the claim value and the realistic probability of recovery – which a short initial review can clarify.

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. To discuss your situation, email info@tutamenlaw.com.

By Helena R. Voss – Partner, Reinstatement, Tutamen

Published June 9, 2026

Page authored by Helena R. Voss, Partner, Reinstatement, Tutamen.

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.