To investigate missing FBA inbound inventory, compare what you sent with what Amazon received, check the shipment's eligibility for research, and submit the requested records through Seller Central. Start with the quantity mismatch; reimbursement depends on Amazon's investigation and policy.
Source check: September 12, 2026. This guide uses public US Seller Central announcements and Amazon moderator guidance. Your marketplace's signed-in shipment workflow controls the actual requirements; we have not verified that private workflow on your account.
1. Reconcile the shipment before requesting reimbursement
Open the shipment's Contents view in Seller Central and compare expected, received and investigated quantities for each SKU/FNSKU. Save the shipment ID, carrier reference and the date of your export. Check whether units have since been received or already reimbursed.
Synthetic example: SKU BLUE-MUG shows 30 sent and 21 received. The initial difference is nine units. If a later check shows three more received, investigate the remaining six; do not submit the stale nine-unit total. The free shipment scanner can highlight differences in a supported CSV, but it cannot decide whether those units qualify for payment.
2. Check delivery timing and research eligibility
Amazon's inbound claim announcement sets a filing interval of 15–60 calendar days after delivery. Record delivery separately from check-in and closure, and follow the research eligibility shown on your shipment. A Closed status alone does not prove that a claim is eligible.
See the deadline guide for a worked example of why a closure-based reminder can be too late. If the research option is unavailable, preserve the message and ask Seller Support what action is required before the applicable deadline.
3. Prepare ownership and delivery records
Amazon's moderator guidance on shipment reconciliation points sellers to proof of inventory ownership and proof of delivery. Check the document requirements linked from your shipment before uploading.
- Have the supplier invoice or applicable ownership record ready, with the product and quantity identifiable.
- Keep tracking and delivery confirmation; for pallet shipments, retain the bill of lading and available signed delivery records.
- Include a box-level breakdown when it helps explain the difference.
- Keep originals; provide records through the authorized Seller Central flow, not a public community thread.
4. Use a factual claim template
Use the shipment research/reconciliation flow where available. Adapt this draft to the fields and evidence actually requested. It is a preparation template, not an Amazon-approved form or a promise of acceptance.
Subject: Request to investigate missing units — [SHIPMENT-ID]
Shipment [SHIPMENT-ID] was delivered on [DELIVERY-DATE], carrier reference [TRACKING-OR-BOL]. Its current status is [STATUS]. I checked the quantities on [CHECK-DATE].
SKU [SKU], FNSKU [FNSKU]: [SENT] sent, [RECEIVED] received, [UNRESOLVED] unresolved after checking later receipts and reimbursements. [Repeat for each affected SKU.]
Attached: [OWNERSHIP-RECORD] and [DELIVERY-RECORD], as requested by the workflow. Please investigate the unresolved units and advise on reimbursement eligibility. Related case or reimbursement references: [REFERENCES-OR-NONE].
5. Keep a follow-up record
Record the case ID, submitted quantities, attachment names and submission date. When Amazon asks for more information, answer the specific request in the existing case where possible. For a partial payment, identify the units and event it covers before marking the shortage resolved. A payment for the same SKU can relate to a different loss.
If the value is disputed, check the cost and re-evaluation workflow in Seller Central. The policy guide explains why a product's sourcing cost and its retail price are different. Do not assume that attaching an invoice guarantees a particular payout.
Where shipments.fyi fits
Scan a supported export to find quantity differences, then review the underlying records yourself. Optional claim tracking helps organize follow-up from a delivery date you provide. Verify that date and eligibility in Seller Central. You submit claims in Seller Central; shipments.fyi does not guarantee approval or automatically reconcile every reimbursement.
Check your shipment CSV for short-received rows — free.
The scan runs in your browser without signup. Saving claims is a separate account action.
Related: FBA deadlines by claim type.