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CONCEPT Cited by 1 source

Early fraud warning

Definition

An early fraud warning (EFW) is a notification issued by a card network (Visa / Mastercard / etc.) that a transaction is likely fraudulent, issued ahead of a formal chargeback. It's a leading indicator: the cardholder or issuer has flagged suspicion, and a chargeback is the likely next step unless the merchant takes corrective action (typically: refund the transaction).

EFWs matter because:

  • Chargebacks impose fees in addition to the transaction reversal.
  • Excessive chargeback rates trigger card-network sanctions (excessive-chargeback monitoring programs, fines, processing- privilege loss). Merchants closely manage their dispute rate.
  • Refund-before-chargeback preserves the merchant's dispute-rate metric while still incurring the revenue loss.

Stripe Radar's prediction of EFWs

Per the 2026-05-27 Stripe Radar disclosure:

"Stripe can now identify whether a payment is likely to trigger an early fraud warning from the card network. You can then choose to proactively refund the transaction and protect your dispute rate."

The architectural insight is that the EFW itself is too late for some merchant workflows — the EFW already indicates the cardholder is flagging fraud. Stripe predicts the EFW before it fires, giving the merchant time to refund preemptively.

This is one of the two named signals in multiprocessor fraud signal export (alongside fraudulent-dispute prediction) — usable by merchants on non-Stripe-processed transactions as well.

The action pattern is preemptive refund on early-fraud-warning: accept guaranteed revenue loss to avoid the larger combined cost of chargeback fees + dispute-rate degradation + potential card-network sanctions.

Distinction from fraudulent-dispute-prediction

EFW prediction targets the card-network's own pre-chargeback signal; fraudulent-dispute prediction targets a fraudulent (as opposed to legitimate) dispute outcome.

  • An EFW can fire on a legitimate-dispute case (e.g. cardholder doesn't recognise a charge that turns out to be valid).
  • A fraudulent dispute requires adversarial intent by the cardholder.

The merchant's response strategies differ: - EFW → preemptive refund. - Fraudulent dispute → gather evidence, contest, deploy Smart Disputes.

Caveats

  • Lead-time of Radar's EFW prediction vs the card-network's EFW not disclosed.
  • Precision/recall envelope of the prediction not disclosed.
  • Coverage across card networks not disclosed.

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