Costco Quantity Discrepancy Chargeback, Explained

Executive Summary & Quick Answer

Executive summary: A quantity discrepancy is the physical-count counterpart to an invoice mismatch: what Costco's depot received doesn't equal what was ordered or invoiced. Shorts, overs, and miscounts all force manual reconciliation in a cross-dock flow built for speed — and Costco deducts the value of the gap. The prevention story is scan-verified picking and correcting the ASN and invoice whenever a shipment goes short.

Quick answer: A Costco quantity discrepancy chargeback is assessed when the quantity received at the depot differs from what was ordered or invoiced — short shipments, overages, or miscounts that force manual reconciliation in Costco's receiving flow. It's prevented by scan-verifying picked quantities against the PO before loading.

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Deep Dive: What Triggers the Quantity Discrepancy Chargeback

Costco's depot counts what arrives and compares it to the order and the invoice. A gap in either direction is a discrepancy:

Type	What Costco sees
Short	Fewer units than ordered/invoiced
Over	More units than ordered — unplanned inventory
Miscount / substitution	Right count, wrong item, or a swap shipped without approval

Because the depot cross-docks to clubs at speed, any discrepancy that forces manual reconciliation is friction Costco pushes back as a deduction. The recurring root is an ASN and invoice built from the PO plan rather than the physically picked load.

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Business & Financial Impact

• Deduction = typically the value of the discrepancy (case-by-case).
• Operational drag: discrepancies stall cross-dock flow, so the cost isn't only the deducted units.
• Compounds with invoice mismatch: the same PO-driven paperwork that shorts the count often mis-bills the invoice too.
• Disputes rely on scan-level pick/pack evidence reconciled to the PO.

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Root Causes (Ranked)

1. Short shipments never corrected on the ASN or invoice.
2. Mispicks or miscounts at the supplier warehouse.
3. Substitutions shipped without approval.
4. Overs from pick errors creating unplanned depot inventory.

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Step-by-Step Prevention Workflow

pick BY SCAN ──► scanned qty == PO qty?
                     │ no → correct ASN + invoice to actual
                     ▼
              load ──► 856 from scans ──► 810 from 856 ──► transmit
                     ▲
        no substitutions without written approval

1. Scan-verify picked quantities against the PO before loading.
2. Correct the ASN and invoice whenever a shipment goes short.
3. Never substitute items without written approval.
4. Generate the 856 and 810 from scans, so paperwork matches the physical load.

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Quantity vs Invoice Mismatch vs Late ASN

Code	What it is	Where it breaks
Quantity discrepancy	Received ≠ ordered/invoiced	Physical count
Invoice mismatch	810 disagrees with 850/856	Invoice data
Late/inaccurate ASN	856 late or wrong	Ship notice

Related: Invoice mismatch · Late ASN · all Costco violations

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Supplier Checklist

• Picked quantities scan-verified against the PO before loading
• ASN and invoice corrected whenever a shipment goes short
• No substitutions without written approval
• 856 and 810 generated from scans, matching the physical load

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FAQs

What is a Costco quantity discrepancy chargeback? A deduction assessed when the quantity received at the depot differs from what was ordered or invoiced — shorts, overs, or miscounts.

How is it different from an invoice mismatch? A quantity discrepancy is a physical-count gap at receiving; an invoice mismatch is a data disagreement between the 810 and the 850/856. They often share a root cause.

What's the most common cause? Short shipments never corrected on the ASN or invoice, and mispicks — usually because paperwork was built from the PO plan, not the actual pick.

How do I prevent quantity discrepancies? Scan-verify picked quantities against the PO before loading, correct the ASN/invoice on any short, and generate the 856/810 from scans.

Can I dispute a quantity discrepancy? Yes, with scan-level pick/pack evidence reconciled to the PO showing what actually shipped. Costco's depot count is otherwise the default record.

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