iGaming fraud isn’t only chargeback — bonus farms, arbing, GNI abuse, collusion. Rule engine + manual review = minimum viable antifraud.

Signals
- Device fingerprint, IP, email pattern
- Deposit → withdraw without play
- Shared payment instrument
Rules engine
Score: block, review, allow. Version rules; measure conversion impact.
Ops
- Risk queue UI
- Withdrawal review SLA
- Label fraud cases for ML later

Checklist
- Block list sync
- False positive monitoring
- SAR workflow where required
Minimal antifraud without ML
- 10–15 velocity rules: device, IP, deposit-withdraw
- Review queue UI with reason codes
- Label fraud vs false positives
- A/B new rules on small traffic %
