Walmart Chargeback Code 12: Invoice incorrectly extended
Extracted from source — pending expert reviewLast verified: 2026-07-09
What this deduction means
A Code 12 is assessed when the invoice math is wrong — the extended amount (unit cost × quantity) does not add up correctly. Walmart recalculates the invoice and deducts the difference.
Typical penalty: Equal to the calculation/extension error on the invoice
Common causes
- Unit cost × quantity miscalculated on a line
- Rounding or currency errors in the totals
- Line totals that do not match the invoice header total
How to prevent Walmart code 12
- Validate invoice math (cost × qty = extended) before transmitting
- Automate EDI 810 generation to remove manual calculation errors
- Reconcile line totals against the invoice total
Related EDI transactions
EDI 810
Source
SPS Commerce SupplierWiki — All Walmart Deduction Codes (secondary industry source) (Accessed 2026-07-09; pending official Retail Link verification)
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Related chargeback codes
Accounts Payable / PricingCode 10: Price difference / allowance differenceAccounts Payable / InvoicingCode 90: Unauthorized charge removedAccounts Payable / InvoicingCode 30: Duplicate billingAccounts Payable / InvoicingCode 33: Wrong PO number on invoiceAccounts Payable / InvoicingCode 60: Unauthorized handling charge