ClaimBack: The App I Build That Finds the Money Amazon Owes FBA Sellers

I build apps for online sellers. This one might be the most satisfying of all — it finds money that is already yours.

Here’s something most Amazon FBA sellers never hear: when Amazon loses, damages or miscounts your inventory, Amazon owes you a reimbursement. It is in their own policy. What they don’t do is tell you. No email, no alert. The money just sits inside your reports, unclaimed.

Audits of FBA accounts keep finding the same thing: on a catalog doing $500K a year, unclaimed reimbursements typically run $2,000 to $8,000. Plus a second, quieter leak — a $2–$5 processing fee on every returned unit that most sellers never even track.

Nobody claims it because checking by hand means lining up inventory, shipment and returns reports line by line. Hours of spreadsheet pain. So we built ClaimBack — a custom app that does the audit for you:

1. Report Puller — pulls your FBA inventory and shipment reports from Seller Central.
2. Mismatch Auditor — lines them up and flags every lost, damaged, miscounted or phantom-returned unit, with the evidence attached.
3. Case Builder — turns each flag into a ready-to-file claim case, in the format Amazon wants.
4. Payout Tracker — follows every claim from filed to paid, and totals the money recovered.

The math is the best part. Recovering even half of what is owed is $1,000–$4,000 a year of pure margin. At a 15% net margin, you would need roughly $26,000 in extra sales to earn the same profit. This money needs no ads, no ranking, no discounts. It is already yours — Amazon is just holding it.

The guide includes the full build roadmap: the exact prompts to scaffold the app in a vibe-coding builder, teach it to read your Seller Central reports, add the case builder and the returns-fee tracker, and deploy it to a live link — with the SP-API connection as the advanced step. Download it above and run your first audit this week.