Walmart Code 13: Substitution overcharge.
Walmart Code 13 means a substitute item was shipped and invoiced at a higher cost than the item ordered, so Walmart paid the lower cost. It is disputable when the substitution and its price were approved.
Why Walmart issues Code 13.
- A substitute shipped without approval
- The substitute was invoiced at its own higher cost
- Item numbers on the ASN and invoice didn't match
- The PO wasn't updated after an approved substitution
Documents that win.
- Purchase order
- Written substitution approval
- Invoice
- ASN listing the shipped item
How to dispute it.
Locate Code 13 on your Walmart remittance and note the invoice and PO.
Collect every document listed above for that shipment.
Submit it in the Accounts Payable Dispute Portal (APDP) in Retail Link, with the documents attached. This code is reported as eligible for mass dispute creation.
If Walmart returns it for supplier action, respond within its 7-day window.
Reviews typically take about 60 to 75 days.
Why disputes on this code fail.
- No approval for the substitution or its price
PreventionGet written approval before shipping a substitute. Invoice substitutes at the approved cost.
Walmart generally reviews accounts payable deduction disputes up to two years after the deduction. Dispute as early as possible: the oldest claims expire first.
Source: Walmart supplier guidance · Verified by Laxmi Narayan · 23 Oct 2026We'll check whether yours is disputable, free, in 72 hours.