A vendor invoice lands for last month's purchase orders and the amount paid is thousands of pounds lighter than expected. Nothing was returned, nothing was damaged in transit that anyone flagged — Amazon has simply deducted a string of chargebacks for ASN errors, late shipments, and carton labelling issues, each one a few pounds or a percentage of the PO, quietly stacked across dozens of shipments. Most 1P vendors never see an itemised breakdown unless they go looking for it.
We work with sellers on both Seller Central and Vendor Central accounts, and the chargeback problem is consistently the one vendors underestimate the most. Here is how Vendor Central chargebacks actually work, which categories cost vendors the most money, and the exact process for disputing deductions and stopping them recurring.
Chargebacks are deducted automatically, before you ever approve them. Amazon's retail supply chain operates on a "deduct first, dispute later" model. If you are not actively auditing your Vendor Central remittance reports, you are paying every chargeback Amazon applies — valid or not — by default.
What Are Vendor Central Chargebacks?
A chargeback is a deduction Amazon applies against a vendor's invoice when a shipment, document, or process fails to meet one of Amazon's operational requirements for 1P (first-party, Vendor Central) purchase orders. Unlike Seller Central reimbursements, which Amazon owes you for its own errors, chargebacks run the other way — Amazon is charging you for compliance failures on your side of the supply chain.
They are applied automatically by Amazon's systems at the point a PO is received, processed, or reconciled, and they appear as line-item deductions on your remittance advice rather than as a separate invoice. This is exactly why they go unnoticed: there is no single email that says "you have been charged £4,200 this month." The deductions are buried inside payment reconciliation data that most vendors only glance at.
The Chargeback Categories That Cost Vendors the Most
Amazon's chargeback policy covers dozens of specific violation codes, but in practice, four categories account for the vast majority of deductions we see across vendor accounts:
ASN Non-Compliance
Your Advance Shipment Notice does not match the physical shipment — wrong carton count, wrong SKU quantities, or missing ASN entirely. Charged per discrepancy, and it compounds across every carton affected.
OTIF Violations
On Time, In Full misses — shipments that arrive outside the scheduled delivery window or short of the full ordered quantity. Usually the single largest chargeback category by total value for high-volume vendors.
Carton & Pallet Labelling
Missing, incorrect, or unscannable GS1-128 labels, wrong carton markings, or non-compliant pallet configuration. Amazon's fulfilment centres charge per mislabelled unit to cover manual processing time.
Routing & Appointment Violations
Shipping via the wrong carrier, missing a scheduled delivery appointment, or failing to follow Amazon's routing instructions for the PO. Charged as a flat fee per violation, separate from any OTIF penalty on the same shipment.
Beyond these four, vendors also see chargebacks for quality inspection failures (QIP), prep and packaging non-compliance, and PO quantity shortfalls where the vendor confirms a quantity it cannot actually fulfil. Each has its own violation code and its own deduction formula, typically a percentage of the PO value or a fixed amount per unit or carton affected.
OTIF: The Chargeback That Hurts Most
On Time, In Full tracking is Amazon's headline vendor performance metric, and it is where the biggest deductions concentrate. Amazon expects a defined percentage of POs (the threshold varies by vendor programme and category, but 95–98% on-time and in-full is the general target) delivered within the scheduled appointment window and shipped at the full confirmed quantity.
- Late shipments are penalised per PO, with the deduction scaling by how many days outside the delivery window the shipment arrived.
- Short shipments — confirming a quantity you cannot deliver in full — are penalised on the shortfall itself, separate from the lateness charge.
- Persistent OTIF failure does not just cost chargebacks. Amazon reduces future PO volume to vendors with a poor OTIF track record, which quietly shrinks your retail business even before a single explicit penalty is applied.
Never confirm a PO quantity you cannot fulfil on time. A partial confirmation with an honest, achievable quantity and timeline is almost always cheaper than a full confirmation followed by a late or short delivery — both outcomes trigger chargebacks, but only one of them also damages your OTIF score going forward.
Why This Belongs on Your PPC Checklist Too
Chargebacks are usually filed under finance or operations, and treated as a cost of doing business. That framing misses the real damage. Every pound deducted from a PO invoice is a pound removed from the margin your PPC budget is supposed to be protecting.
- Your true ACoS is worse than your dashboard shows. Sponsored Products and Sponsored Brands ACoS is calculated against ad-attributed sales, not against the margin that actually survives chargeback deductions. A vendor running what looks like a healthy 18% ACoS on paper can be running a materially worse number once chargebacks are factored into landed profitability per unit.
- Scaling spend on a leaking margin accelerates the leak. If a category is carrying a persistent OTIF or ASN compliance problem, increasing PPC spend to grow that category's sales volume increases the PO volume, carton count, and shipment frequency — and therefore the absolute pound value of chargebacks, even if the violation rate per shipment stays flat.
- Fixing compliance is often the highest-ROI lever available. For many vendors, the fastest way to improve blended profitability is not a PPC optimisation at all — it is an ASN and labelling audit that stops a few thousand pounds a month leaking out before the ad spend is even measured.
How to Audit and Dispute Chargebacks: Step-by-Step
Most vendors assume chargebacks are non-negotiable. A meaningful share are disputable, provided you can show Amazon's own system data, carrier proof-of-delivery, or ASN records that contradict the violation.
Pull the Chargeback Detail Report
In Vendor Central, go to Reports → Payments and run the Chargeback Detail (or Deductions) report for the period covering your invoice shortfall. This itemises every deduction by PO number, violation code, and amount — the data that never appears on the invoice itself.
Group deductions by violation code and PO
Sort the report to see which violation codes are generating the most total value, not just the most occurrences. A handful of high-value OTIF misses on large POs often outweighs dozens of small labelling fees — prioritise your dispute and prevention effort accordingly.
Match each disputed deduction against your own records
For ASN errors, compare against your actual shipment manifest. For OTIF misses, pull carrier tracking and proof-of-delivery timestamps. A chargeback for a "late" delivery that your carrier's own timestamp shows arrived inside the appointment window is a strong, evidence-backed dispute.
File the dispute through the correct channel
Disputes are filed either through the Chargeback Dispute tool within Vendor Central (available for most compliance categories) or via a case with your Vendor Manager/Supplier Specialist for categories without a self-service dispute flow. Attach your evidence — carrier timestamps, ASN records, or warehouse receiving confirmation — directly to the case.
Track resolution and reconcile the credit
Successful disputes are credited on a future remittance, not refunded immediately, so log every disputed case with its reference number and check it against your next payment cycle. Vendors that don't track this systematically lose visibility of which disputes actually resolved.
Preventing Chargebacks Before They Happen
- Build ASN accuracy checks into your warehouse process. The ASN should be generated from the same pick/pack data that determines what actually ships, not typed up separately from a planned quantity.
- Only confirm PO quantities and dates you can genuinely meet. A partial confirmation is always cheaper than a confirmed-then-missed delivery, both in chargebacks and in OTIF score.
- Standardise GS1-128 carton labelling across every 3PL or warehouse that ships to Amazon on your behalf, and audit a sample of outgoing cartons before dispatch.
- Review routing requests before booking freight to confirm the carrier and appointment match what Amazon specified for that PO.
- Run the Chargeback Detail Report monthly, not just when an invoice looks short. Monthly review catches a new recurring violation while it is still a small problem.
- Feed chargeback data back into category-level profitability, so PPC budget decisions reflect true landed margin per ASIN, not just ad-attributed ACoS.
Not sure how much chargebacks are costing you?
StoreStride audits vendor and seller accounts together — PPC efficiency, listing health, and the compliance issues quietly eating into margin. Book a free audit and we'll show you exactly where the money is going.
Get Free Amazon PPC Audit →Common Questions About Vendor Central Chargebacks
Can all Vendor Central chargebacks be disputed?
No. Some violation categories have a self-service dispute flow with a strict evidence requirement and time window (often 30–90 days from the deduction, depending on the category), while others require escalation through your Vendor Manager and are harder to reverse without strong documentation. The key is disputing promptly — most dispute windows close faster than vendors expect.
How much do chargebacks typically cost a mid-size vendor?
It varies enormously by category and shipment volume, but it is common to see 1–3% of gross PO value lost to chargebacks for vendors with no active compliance process, concentrated in OTIF and ASN categories. For a vendor billing several hundred thousand pounds a year through Vendor Central, that is a material, recoverable amount sitting in remittance data most teams never open.
Does a high chargeback rate affect anything beyond the deduction itself?
Yes. Persistent OTIF and compliance failures affect your vendor scorecard, which Amazon uses to influence future PO volume and, in some categories, continued vendor status. A vendor treating chargebacks purely as a finance line item is missing the operational risk building underneath it.
Should Seller Central sellers worry about this too?
Vendor Central chargebacks specifically apply to 1P vendors. Seller Central (3P) sellers face a different set of deductions — FBA fee discrepancies, inventory reimbursement shortfalls, and similar issues — which run the opposite direction and are generally something Amazon owes the seller, not the other way round. If you operate a hybrid account, both processes need separate monitoring.