Why did my ecommerce business receive an NF chargeback?

You should not have. NF applies to ATM cash disputes, so an NF against an online sale indicates a reason-code mapping error at the processor or a miscoded transaction type on your MID. Raise it with your acquirer rather than fighting it on the merits.

What single piece of evidence matters most for an NF dispute?

The ATM electronic journal for the session. It records the requested amount, the dispense result, and any error or retract event. Paired with a clean cash reconciliation for that cassette, it is usually decisive.

The ATM genuinely shorted the customer. Do I still respond?

Yes. Credit the undispensed amount as soon as your balancing confirms the shortfall, then respond to the dispute with proof of that adjustment. Documented proactive correction closes the case cleanly and keeps it from counting against you as a lost chargeback.

Discover · Consumer Disputes

Reason code NF: Non-Receipt of Cash from ATM

The cardholder used a Discover card at an ATM and claims the machine dispensed less cash than the amount debited, or no cash at all. The dispute targets the ATM acquirer or operator rather than a retail merchant. Resolution turns on the machine's electronic journal and cash reconciliation for that session.

Issuer filing window

typically 120 days from the processing date

Merchant response window

typically 30 days to respond

Why NF chargebacks happen

A hardware fault caused a partial dispense or a jam after the debit was recorded.
The transaction timed out or reversed on-screen but the account debit still posted.
The cassette configuration did not match the loaded denominations, dispensing less than requested.
The customer walked away before the notes presented and the machine retracted them.
A skimming or cash-trapping device on a compromised terminal intercepted the dispense.

How to fight a NF chargeback

Pull the ATM's electronic journal for the exact session showing the requested amount, dispense confirmation, and any error or retract events.
Provide the cash balancing report for that terminal proving the cassette counts reconcile with a full dispense.
Include maintenance logs demonstrating no fault, jam, or retract occurred at the disputed timestamp.
Supply camera footage of the session if the terminal or site has it.
If the journal shows a partial dispense or reversal, credit the undispensed portion promptly and document the adjustment in your response.

How to prevent NF chargebacks

Reconcile every terminal's cash position against its electronic journal daily so dispense discrepancies surface within hours.
Maintain dispensers and sensors on a preventive schedule to minimize jams and partial dispenses.
Configure automatic reversal messaging so failed dispenses release the hold before the debit posts.
Inspect terminals regularly for cash-trapping and skimming hardware.
Keep journal and camera retention long enough to cover the full dispute filing window.

Frequently asked questions

Why did my ecommerce business receive an NF chargeback?: You should not have. NF applies to ATM cash disputes, so an NF against an online sale indicates a reason-code mapping error at the processor or a miscoded transaction type on your MID. Raise it with your acquirer rather than fighting it on the merits.
What single piece of evidence matters most for an NF dispute?: The ATM electronic journal for the session. It records the requested amount, the dispense result, and any error or retract event. Paired with a clean cash reconciliation for that cassette, it is usually decisive.
The ATM genuinely shorted the customer. Do I still respond?: Yes. Credit the undispensed amount as soon as your balancing confirms the shortfall, then respond to the dispute with proof of that adjustment. Documented proactive correction closes the case cleanly and keeps it from counting against you as a lost chargeback.

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