How to dispute Walmart deduction code 90 (Post-audit claim).
A step-by-step guide for CPG operators: what triggers Walmart code 90, the exact evidence required, the filing window in APDP (Accounts Payable Disputes Portal), the typical success rate, and the SOP fix that prevents repeats.
- Walmart code 90 (Post-audit claim) — Third-party audit firm (Connolly, PRGX, etc.) retroactively flagged a duplicate payment, missed allowance, or pricing error from prior years. Often appears 12–36 months after the original transaction.
- File in APDP (Accounts Payable Disputes Portal) within typically 90 days to respond from claim date (varies by audit firm).
- Required evidence: Original PO, original invoice, original remittance showing the deduction was already taken (or that the allowance was already paid). Bank reconciliation when payment is in question.
- Typical success rate when evidence is complete: 50–70% — many post-audit claims are valid; the rest are double-counted deductions.
- Prevent repeats by: Maintain a post-audit response file by year; never pay a post-audit claim without checking it against the original remittance.
What Walmart code 90 actually means
Third-party audit firm (Connolly, PRGX, etc.) retroactively flagged a duplicate payment, missed allowance, or pricing error from prior years. Often appears 12–36 months after the original transaction. On the remittance it appears as code 90 — Post-audit claim. Disputes are filed in APDP (Accounts Payable Disputes Portal), and the filing window is typically 90 days to respond from claim date (varies by audit firm).
Source: Walmart Post-Audit Recovery process; common third-party audit firms. Last reviewed: 2026-04-17.
Step-by-step: how to dispute Walmart code 90
- 1
Confirm the deduction is in scope
Locate the deduction on your Walmart remittance and confirm the reason matches code 90 (Post-audit claim). Note the deduction post date — your filing window starts there.
- 2
Pull the evidence packet
Gather: Original PO, original invoice, original remittance showing the deduction was already taken (or that the allowance was already paid). Bank reconciliation when payment is in question.
- 3
File the dispute in APDP (Accounts Payable Disputes Portal)
Open APDP (Accounts Payable Disputes Portal), locate the deduction, and attach your evidence packet. Filing window: Typically 90 days to respond from claim date (varies by audit firm). Late filings are auto-denied — file as soon as the packet is complete.
- 4
Track the response
Most Walmart dispute responses land in 30–60 days. Approved disputes are credited on the next remittance cycle. Denied disputes can be re-filed once with additional evidence; track the re-file deadline.
- 5
Fix the root cause
Maintain a post-audit response file by year; never pay a post-audit claim without checking it against the original remittance.
Required evidence
Original PO, original invoice, original remittance showing the deduction was already taken (or that the allowance was already paid). Bank reconciliation when payment is in question.
Build the packet once — most Walmart disputes lose because the evidence arrives incomplete, not because the underlying dispute is weak.
Timeline & deadlines
- Filing window
- Typically 90 days to respond from claim date (varies by audit firm)
- Response window
- Most Walmart responses land in 30–60 days from filing.
- Typical success rate
- 50–70% — many post-audit claims are valid; the rest are double-counted deductions
Why Walmart code 90 deductions happen
Third-party audit firm (Connolly, PRGX, etc.) retroactively flagged a duplicate payment, missed allowance, or pricing error from prior years. Often appears 12–36 months after the original transaction. In practice, this is rarely a single root cause. Walmart's receiving and audit systems flag post-audit claim the moment a discrepancy hits the threshold — so even a clean shipment can take a deduction if the paperwork or the EDI handshake doesn't reconcile cleanly on the retailer's side. That's why almost every code 90 packet hinges on documentation timing, not on whether the shipment was actually correct.
How to prevent Walmart code 90 going forward
Maintain a post-audit response file by year; never pay a post-audit claim without checking it against the original remittance.
Filing wins back the dollars; the SOP fix is what stops you from filing the same dispute again next quarter.
Want this filed for you?
ClearChain runs Walmart dispute filing end-to-end. Flat $5,000/month, no percentage of recoveries. If we don't recover at least 3x your fee, you get your money back.
Flat $5,000/month, month-to-month. If we don't recover at least 3x your fee, you get your money back.
Typical response: same business day.