Walmart code 30: Duplicate Billing
Walmart code 30 is a duplicate billing deduction: Walmart identified two invoices it considered the same charge and deducted one of them.
The same invoice was transmitted twice, or two separate shipments were invoiced in a way that looked identical — same PO, same amount, same date — to Walmart’s matching logic.
Recoverable when the two invoices really do represent two shipments, which is common on split POs. A true duplicate transmission is valid and should be written off rather than fought.
Evidence that settles a 30 dispute
Most decisive first. A dispute filed without the first item on this list rarely survives review.
- 1 Both invoices (EDI 810) side by side with distinct shipment references
- 2 Separate proofs of delivery for each shipment
- 3 Separate bills of lading and ASN transmissions
- 4 Remittance history showing only one of the two was ever paid
How to stop code 30 recurring
Duplicate claims come from invoices that cannot be told apart. One invoice per shipment, each carrying its own shipment and ASN reference, gives the matching logic something unambiguous to key on.
Endless keeps the purchase order, the pack, the ASN, the bill of lading, and the invoice on one record, so the documents that settle a Walmart deduction are already connected when the claim posts. EndlessEDI builds carton-level 856s against scanned SSCC labels and validates the shipment before it goes out, which is what moves the number down: brands on Endless report a 90% drop in retailer EDI chargebacks.
- Where to dispute
- Most AP deductions surface and are disputed in the Accounts Payable Disputes Portal (APDP) inside Retail Link. OTIF fines are accounts receivable deductions and follow a separate path with a shorter window.
- Dispute window
- Reported windows vary by claim type: roughly 12 months from the invoice date for shortage deductions and up to two years for general invoice disputes, against a reported window closer to 30 days from invoicing for OTIF. Confirm the current deadline in APDP before you plan a recovery batch.
Related Walmart codes
Deduction programs and dispute windows change and vary by vendor agreement. Figures marked “reported” come from third-party supplier resources, not a retailer’s published fee schedule — confirm against your current routing guide and supplier agreement before you file. See every Walmart deduction code .
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