What Discover AW means
The disputed part is the difference between what the cardholder approved and what was charged, such as added tips, fees or a different final total.
Common causes
- Tip or fee added after the customer signed or approved
- Order edited after checkout to a higher total
- System posting a different amount than authorized
Evidence that answers it
- The approved order total or signed receipt
- Customer consent to any added charges
- Proof of credit if the difference was refunded
How to prevent it
- Do not change totals after approval without written consent
- Send an updated invoice and get approval for any increase
How Verdikx helps with AW
Verdikx's incorrect-amount playbook attaches the itemized order total from Shopify and any customer messages approving a change (helpdesks, beta). You review the AI draft before it goes out.
Frequently asked questions
What does Discover reason code AW mean?
Discover AW, called Transaction Amount Differs in Chase's guide, means the cardholder says the amount was changed without their consent after they agreed to it. Win with proof the cardholder is responsible for the additional charges, proof the receipt was not altered after approval, or proof a credit was issued.
Is Discover AW worth fighting?
Our reference rates AW (Altered Amount) sometimes winnable, depending on the evidence you have. The evidence that answers it starts with customer consent to any added charges. The cardholder's bank decides the outcome.
How long does a cardholder have to file a Discover AW chargeback?
Usually 120 days from the transaction date, under the network's issuer time limits for most codes. Your processor gives you far less time to respond, so work from the due date on the case.
Answer your next AW with the right evidence.
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Sources
- Chase Merchant Services: Chargeback Reason Codes user guide (04/2018), Discover section (checked October 5, 2026)
- Solidgate Docs: Chargeback reason codes (Discover and American Express) (checked October 5, 2026)
Last reviewed by Verdikx Research.