The verdict in three sentences
With mobile money there is no chargeback like on cards: you carry the risk, not the bank. Fraud therefore shifts to fake payment proofs, SIM-swap and friendly fraud. The defence is simple: never approve an order on a screenshot, only on server-side confirmation (webhook), which cuts fraud by over 90 %.
The fraud vectors to know
| Vector | How it works | Estimated share* | Countermeasure |
|---|---|---|---|
| Fake screenshot | Edited "proof" of payment | ~2-4 % of orders (naive stores) | Mandatory webhook |
| SIM-swap | Hijacked number for 24-72 h | Rare but costly | OTP + shipping delay |
| Friendly fraud | Buyer denies paying/receiving | ~1-2 % | Signed proof of delivery |
| Mule account | Wallet opened in a third party's name | Variable | KYC + velocity limits |
| Over-refund | Refund demand after receipt | ~1 % | Dispute reserve 5-10 % |
*2026 orders of magnitude, highly sector- and basket-dependent.
What all vectors share: they exploit visual trust. A screenshot proves nothing. Only the operator's server notification, received on your webhook and matched to the exact amount, is authoritative.
Server-side verification checklist
| Control | Purpose | Fraud impact |
|---|---|---|
| Webhook confirmation | Validate the real payment | -90 % and more |
| Exact-amount reconciliation | Detect partial payments | High |
| Velocity rule (>3 orders/hour) | Spot bursts | Medium-high |
| 24-72 h shipping delay on large baskets | Neutralize SIM-swap | High |
| Dispute reserve 5-10 % | Absorb abusive refunds | Cash flow |
| Block repeat numbers/IPs | Stop mules | Medium |
The velocity rule is underrated: more than 3 orders per hour from the same number or IP should raise a flag and route the order to manual review.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Mini case study
Ibrahim, an e-merchant in Abidjan, approved orders on a WhatsApp screenshot. On 300 orders/month at 25,000 FCFA, ~3 % were fake proofs — 9 orders shipped and never paid: 225,000 FCFA lost monthly. Switching to webhook confirmation and a 7 % dispute reserve brought fraud below 0.3 %, saving ~200,000 FCFA/month.
FAQ
Is a payment screenshot worth anything? None: it can be faked in seconds. Only server confirmation (operator webhook) matched to the exact amount proves a payment.
What is SIM-swap and how do I guard against it? It is the temporary (24-72 h) hijack of a customer's number to validate payments. A shipping delay and an OTP on large baskets neutralize most of the risk.
Can I chargeback like on a card? No, mobile money has no merchant chargeback. That is why upstream prevention and a 5-10 % dispute reserve are essential.
How much fraud can I eliminate? Webhook confirmation removes over 90 % of fake-proof cases. Velocity rules and shipping delays cover most of the rest.
What is a dispute reserve? You set aside 5-10 % of collected revenue to cover refunds and disputes. It protects cash flow without freezing your business.
Let's talk about your project. We secure your mobile-money checkout: webhook confirmation, velocity rules and dispute handling. 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.
