Weight and dimension fee overcharge: a seller's checklist

An overcharge on fulfillment fees is easy to dismiss as a rounding error. It rarely is. When Amazon's measurement system logs a product at the wrong weight or the wrong dimensional bracket, the platform charges the higher rate on every single unit that ships – across every order, every week, until someone catches it and presses the claim. For a seller moving volume, the cumulative drain can be significant.

TL;DRA weight and dimension fee overcharge occurs when Amazon's automated measurement of a product's weight or physical dimensions places it in a higher FBA fee tier than its actual measurements justify, resulting in overbilling on fulfillment fees. On Amazon UK, sellers have a defined path to request a re-measurement and recover overcharged amounts, but the window is not unlimited and a weak submission is often closed without a substantive review. Acting early and systematically is the only way to protect the full value of the claim.

This checklist works through five phases: confirming the discrepancy, building the evidence file, submitting correctly, handling the response, and deciding when to escalate. Each phase has a specific set of checks. Work through them in order.

Phase 1: Is there actually an overcharge – and how large is it?

The first check is always whether the fee discrepancy is real and material, because Amazon's catalog carries measurement data from multiple sources and not all of it is wrong in your favor.

Pull the fee preview from Manage FBA Inventory and compare it against the published Amazon UK FBA fee schedule for the size tier. That schedule lists the weight and dimension thresholds that separate the tiers. Note exactly which tier Amazon has assigned each affected ASIN.

Then get your own measurements. Use a calibrated scale and a tape measure. Measure the packaged unit – not the product alone. Amazon measures the product in its shipping packaging, and that is the number that determines the tier. Measure at least three units from separate production batches and record all three readings.

• Compare your measured weight to the "unit weight" shown in the fee detail screen in Seller Central.
• Compare your measured dimensions to the "product dimensions" on the same screen.
• Identify the tier Amazon has assigned and the tier your measurements support.
• Calculate the per-unit fee difference between the two tiers using the published schedule.
• Multiply by the total units shipped since the discrepancy first appeared.

If the per-unit difference is small but the ASIN has high velocity, the aggregate overcharge can be material. In matters we handle, sellers frequently underestimate the cumulative figure because they look at the per-shipment fee rather than the total shipped volume. Do not skip the multiplication step.

One practical threshold to know: if Amazon's recorded dimensions are within a small tolerance of your measured dimensions, the measurement may be within the platform's own calibration range. In that scenario a formal re-measurement request is still worth filing, but your expectation of the outcome should be tempered.

Phase 2: What records do you actually need before you file?

Every credible overcharge submission rests on a document set, and assembling that set before you open a case is what separates a claim that moves forward from one that is dismissed in the first response.

The core documents are: a written measurement log (date, product, batch, scale reading, tape reading); photographs of the unit on the scale and next to a rule or measuring tape; any manufacturer specification sheet or packing specification that confirms the product's physical dimensions; and the Seller Central fee detail showing the tier Amazon applied.

• Measurement log – dated, signed, with batch or lot identifiers where available.
• Photographs – clear, well-lit, showing the unit on a scale and against a measuring rule. Include the ASIN label in at least one image so the product is identifiable.
• Manufacturer or packing specification – a document that predates the complaint and is not prepared specifically for the dispute.
• Fee detail export from Seller Central – the "Payments" or "FBA Fee Preview" screen, exported as a file, not a screenshot alone.
• Transaction-level fee report – the full FBA transaction-level fee report covering the period of overcharging, downloaded from Seller Central reports.
• ASIN detail page showing current published dimensions – to show what Amazon itself displays to buyers, which may differ from the back-end measurement Amazon used for fees.

We regularly see sellers file with only photographs and a brief written description. Amazon's internal review team routinely sends those back requesting the fee report or the manufacturer spec. Assembling the complete set on the first submission avoids that round-trip and keeps the timeline tighter.

Store everything in a single folder – named by ASIN and date – before you open the case. You will need to re-upload or re-cite these documents if the first response requests additional information or if the matter escalates.

Phase 3: How do you submit the re-measurement request on Amazon UK?

The re-measurement route on Amazon UK runs through Seller Central, and the specific path matters because a case opened in the wrong category can sit in a queue with no specialist to action it.

Open a new case in Seller Central under "FBA Issue" and select the sub-category relating to product dimensions or fulfillment fees. In the subject line, write the ASIN and the nature of the issue directly – for example: "ASIN [X] – incorrect dimension/weight measurement, overcharge on FBA fees." Do not use a vague subject line. Vague lines delay routing.

• In the body of the case, state the ASIN, the tier Amazon has assigned, and the tier your measurements support – in plain figures.
• State the per-unit fee difference and the total number of units shipped in the overcharge period.
• Attach the measurement log, the photographs, the manufacturer spec, and the fee report.
• Request two things explicitly: (1) a physical re-measurement of units held at an Amazon UK fulfillment center, and (2) a fee adjustment covering the overcharge period.
• Do not request both in separate cases. One case, both requests, clearly numbered in the body text.

Amazon UK's Fulfillment Center Operations team handles the physical re-measurement. The Selling Partner Support team handles the case routing. They are not the same team, and a case that reaches Selling Partner Support without a clear re-measurement request may be resolved with a catalog update alone – which corrects future fees but does not produce a retroactive reimbursement.

Set a reminder to follow up if you receive no substantive response within a reasonable period. The first response is often a templated acknowledgment; wait for the substantive reply before deciding how to respond. If the first substantive response is a rejection without explanation, that is not a final answer – it is the start of the escalation path in Phase 4.

For a broader picture of how FBA reimbursement claims fit into the full funds-recovery process, the complete guide to frozen funds recovery for Amazon sellers sets out the procedural landscape across all claim types.

Phase 4: What do you do when Amazon rejects or partially allows the claim?

A rejection on the first submission is common and does not mean the claim is closed – it typically means the submission did not satisfy the review team's threshold for the re-measurement or the retroactive credit.

Read the rejection carefully. Amazon's response will either (a) dispute your measurement data, (b) acknowledge a discrepancy but decline to extend it retroactively, or (c) close the case without a substantive reason. Each scenario has a different next step.

If the response disputes your measurement data, the answer is to request a formal re-measurement. Amazon UK can physically re-measure units held at a UK fulfillment center. Request this in writing, cite the case reference, and re-attach your measurement documentation. A physical re-measurement by Amazon's own team that confirms your figures is the strongest possible evidence for the retroactive credit.

If Amazon acknowledges the dimension error but declines the retroactive adjustment, the question becomes whether the overcharge period is documented to the degree required for a formal credit request. Review the transaction-level fee report again, calculate the exact overcharge amount, and resubmit with the calculation set out line by line. Vague claims for "reimbursement of excess fees" are far easier to decline than a specific, documented figure with a transaction reference backing each line.

• Keep every case reference number. You will need them to link a second submission to the original.
• Escalate through the "executive escalation" or Account Health channel if the standard case team closes without substantive engagement twice in a row.
• If your Account Health is otherwise good, a call through the Account Health support line can reach a team with more latitude to reopen the calculation.
• Document every response, every timestamp, and every attachment submitted. This record is the evidence base if the matter goes beyond Seller Central.

In matters we handle involving catalog measurement errors, a re-measurement result from Amazon's own fulfillment center that confirms the seller's data has consistently been the turning point. The operational reality is that Amazon's own measurement result carries more weight in the internal review than seller-supplied photography alone.

A related scenario worth checking at this stage: if inventory was removed or disposed of during the same period, there may be a parallel discrepancy on the removal or disposal records. The removal order discrepancy checklist covers that path in detail.

Phase 5: When does this need a lawyer, and what are the decision points?

Most weight and dimension overcharge claims can be resolved through Seller Central without legal involvement – if the evidence is strong, the submission is structured correctly, and Amazon's internal review functions as designed. The decision to bring in a specialist turns on a small number of concrete factors.

Consider the aggregate overcharge amount. A small overcharge on a low-velocity ASIN may cost more to pursue professionally than it would recover. A large aggregate overcharge on a high-velocity ASIN, or a pattern of measurement errors across multiple ASINs, justifies a more formal approach. What is the actual figure at stake? That is the first question.

Consider whether the account is also deactivated or funds are separately held. When a weight-fee overcharge sits inside a broader frozen-funds situation – where disbursements are withheld, an account is deactivated under the BSA, or there is a reserve policy running – the re-measurement claim is one of several claims that need to be mapped and pressed together. Pursuing them in the wrong order, or separately without a coordinated strategy, can forfeit the weaker claim while the stronger one is pending.

The myth worth addressing directly: held or overcharged funds are not gone. The disbursement hold, the reserve, the overcharged fee – these are amounts Amazon holds or charges within a system that has formal claims paths. The path may be slow and the submissions may need to be revised, but the entitlement does not disappear at account deactivation. In matters involving deactivation with an outstanding fee overcharge claim, we work to run both the reinstatement and the funds claim on a coordinated timeline.

• If the aggregate overcharge is material and two Seller Central submissions have produced no substantive credit, external help is worth the cost of the review call.
• If the account is also deactivated or there is a disbursement hold running in parallel, map all outstanding claims before filing any one of them.
• If Amazon has acknowledged the measurement error but is declining the retroactive credit on procedural grounds, a formal pre-arbitration demand under the BSA dispute mechanism may be the appropriate tool.
• If the issue spans multiple ASINs, a coordinated claim is more efficient and more persuasive than filing separate cases per ASIN over time.

For context on how disposed inventory claims interact with overcharge and disbursement issues, what changed with disposed inventory claims and what to do now is worth reading alongside this checklist.

A micro-case from our practice: a health-and-beauty FBA seller on Amazon UK (winter 2025) came to us after two Seller Central submissions on a dimension overcharge were rejected without a substantive reason. We reviewed the account, identified that the ASIN was sitting in a higher size tier across several hundred units shipped per month, and requested a formal physical re-measurement through a structured case escalation. Amazon's re-measurement confirmed the seller's dimensions. We then submitted a documented retroactive credit calculation and the fee adjustment was applied. The account was not deactivated and there was no separate funds hold – this was a straightforward overcharge recovery, resolved without arbitration.

The steps above lay out the standard route. Your specific situation turns on the exact discrepancy, the volume of units shipped, the account history, and how far the Seller Central process has already run. That is what we review first.

If the claim is material and the Seller Central route has stalled, email info@tutamenlaw.com for a short review of where the matter stands and what is still open.

What if there are multiple ASINs with measurement errors?

A single measurement error is a data entry problem. Multiple ASINs with systematic measurement errors is a catalog-level issue that requires a different filing strategy.

When more than one ASIN is affected, do not file separate individual cases. Compile the full list of affected ASINs, the measurement discrepancy for each, and the aggregate overcharge across all of them. File a single case that presents the pattern. An internal Amazon review that sees a pattern across multiple ASINs is more likely to escalate to a team with authority to issue a larger credit than a series of single-ASIN cases resolved by different agents over time.

There is also a timing advantage. Multiple ASINs filed together create a single reference point for escalation. If that case is rejected, one escalation covers the whole claim. Multiple separate cases may produce multiple separate rejections, and re-linking them in an escalation adds unnecessary complexity.

Cross-check the multi-ASIN list against your FBA transaction-level fee report. Run the calculation at the ASIN level and then aggregate. Present both levels in the submission: the per-ASIN detail and the total. Amazon's review teams handle cases more efficiently when the arithmetic is done for them and the figures are unambiguous.

Related areas of our practice

Related areas

• Frozen funds and disbursement recovery – full practice covering holds, reserves, and FBA reimbursement claims
• Removal order discrepancy checklist – parallel checklist for inventory discrepancy claims at removal
• Disposed inventory claims – what changed in how Amazon handles these and the current filing approach

Frequently asked questions

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

Resolution timelines vary depending on whether Amazon agrees to a physical re-measurement and whether the retroactive credit is disputed. A straightforward case where Amazon's internal measurement confirms the discrepancy and the fee period is well-documented can move through the Seller Central process in several weeks. Cases that require escalation, a second submission, or a formal pre-arbitration demand under the BSA dispute mechanism take considerably longer. There is no guaranteed timeline, and cases that begin with incomplete documentation typically take longer because they require at least one resubmission round before substantive review begins.

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

The primary risk is a weak first submission that generates an automatic rejection, narrows what is still procedurally open, and consumes part of the limited window for retroactive claims. A second risk is filing per-ASIN cases separately when a coordinated multi-ASIN submission would be materially stronger. Sellers also frequently miss the parallel claim: if a disbursement hold or account reserve is running at the same time as the overcharge, pursuing the fee claim without addressing the hold can result in a credit that is absorbed into the reserve rather than disbursed. In matters we handle, the most common error is submitting without the transaction-level fee report, which means the credit calculation is not evidenced and Amazon declines on that basis.

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

Not in every case. If the overcharge is on a single ASIN, the evidence is clean, and the Seller Central submissions have not yet been tried, a well-structured self-filed case is a reasonable first step. Legal involvement adds clear value when: the aggregate overcharge is material; two or more submissions have been rejected; the account is also deactivated or funds are separately held; the pattern covers multiple ASINs; or Amazon has acknowledged the discrepancy but is refusing the retroactive credit on procedural grounds. At that point the formal dispute mechanism under the BSA – a Notice of Dispute, a pre-arbitration demand, and where necessary arbitration – becomes the realistic route, and that work is attorney-led. The right question is not whether you need a lawyer, but whether the amount at stake and the state of the Seller Central process make professional involvement cost-effective. We offer a short review call to answer exactly that question, with fees quoted up front before any engagement begins.

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. The firm operates independently, with no parent company, group, or external network. To discuss your situation, email info@tutamenlaw.com.

Author: Helena R. Voss – Partner, Reinstatement

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.