The verdict in three sentences
In Lagos, card fraud is fought with mandatory 3DS 2.0, a chargeback cost of 0.5 to 1.5 % and a 3 to 7 % conversion hit from strong authentication. In Abidjan, mobile money fraud is curbed with OTP, dynamic caps and scoring, keeping fraud at 0.2 to 0.8 % of GMV. The right strategy balances security and conversion: too much friction kills sales, too little opens the door to fraud.
Anti-fraud rules and alert thresholds 2026
A simple rules engine already catches most attempts. Here are common thresholds and their effect, as a 2026 order of magnitude.
| Rule | Alert threshold | Action |
|---|---|---|
| Transaction velocity | > 5 payments / 10 min | Step-up auth |
| Abnormal amount | > 3× average order | Manual review |
| New device + high amount | 1st time > 100,000 FCFA | Reduced cap 48 h |
| Repeated OTP failures | > 3 failures | Temporary block |
| Recent SIM/card | < 7 days | +risk scoring |
| Geo mismatch | Different country | 3DS/OTP challenge |
Impact of 3DS and chargebacks on unit economics
3DS protects but costs conversion. A chargeback stacks the lost amount, the dispute fee and the unrecovered goods. Comparison Lagos (card) vs Abidjan (mobile money).
| Parameter | Lagos (card) | Abidjan (mobile money) |
|---|---|---|
| Fraud rate | 0.5-1.5 % of GMV | 0.2-0.8 % of GMV |
| Authentication | 3DS 2.0 mandatory | SMS OTP |
| Dispute fee | 1,000-5,000 NGN | Low |
| Conversion impact | -3 to -7 % | -1 to -3 % |
| Risky-BIN blocking | Yes | N/A |
| Reversibility | Frequent chargeback | Rare |
Mini case study
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Emeka runs an online store in Lagos with a GMV of NGN 20,000,000/month. At a 1.2 % fraud rate he lost NGN 240,000/month. By blocking risky BINs and applying step-up 3DS above NGN 50,000, he cuts fraud to 0.5 %, i.e. NGN 100,000/month, adding friction on only 6 % of orders. Net gain: NGN 140,000/month.
FAQ
What is a normal card fraud rate? The 2026 order of magnitude in Lagos is 0.5 to 1.5 % of GMV, versus 0.2 to 0.8 % on Abidjan mobile money where chargebacks are rarer.
Is 3DS 2.0 mandatory in Nigeria? Yes, strong 3DS 2.0 authentication is required on card payments in Lagos in 2026, cutting fraud but costing 3 to 7 % of conversion.
How much does a chargeback cost? Beyond the refunded amount, the dispute fee is NGN 1,000-5,000, and shipped goods are rarely recovered, so the total cost is high.
How do I limit friction? Apply step-up 3DS only above a threshold (e.g. NGN 50,000) or on risky signals, rather than on every transaction.
Does scoring block real customers? A good rules engine targets under 1 % false positives; measure and tune thresholds monthly to protect conversion.
Let's talk about your project. We deploy your anti-fraud engine (OTP, scoring, 3DS) tuned to protect margins without breaking conversion. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
