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FBA fee overcharges
Amazon remeasures a product's dimensions or weight incorrectly, and every order after that gets billed at the wrong fulfillment or storage tier.
Where to spot it
Fee Preview report and the Dimension and Weight discrepancy data in Seller Central.
Claim window
Typically 60 days from the affected shipment or billing cycle, though some overcharge types can be disputed further back.
Evidence Amazon accepts
Your own verified product dimensions and weight, ideally with a third-party measurement, against Amazon's recorded values.
Why claims get denied
Amazon's on-file measurement disputed without supporting documentation, or the product's packaging changed since the last measurement.
How to appeal
Submit a physical remeasurement request with photos and exact figures to correct the dimension record going forward, then claim the historical difference.
How Refunzo automates it
Refunzo audits your verified dimensions against what Amazon has on file and flags every order billed at the wrong tier.