Nigeria's AI Banking Mandate: Security vs Access

The Central Bank just mandated AI fraud detection. But the real fraud might be who gets left out.

Nigeria’s Central Bank now requires all digital banks to implement AI-powered fraud detection — liveness verification, real-time BVN/NIN validation, and lifetime limits on phone number changes. It’s a comprehensive response to rising fraud as digital transactions scale.

But here’s what the mandate doesn’t address: How do you verify someone’s “liveness” when they don’t have reliable internet? How do you validate identity documents that millions still don’t possess?

The numbers tell the story. Nigeria processes 11 billion transactions annually, yet 26% of adults remain financially excluded. In rural areas, that jumps to 37%. In northern regions, 47%.

This creates a fundamental tension. AI-powered security systems are designed for users with smartphones, stable connectivity, and formal identity documents. They excel at detecting sophisticated fraud patterns but struggle with the informal, cash-based realities where most excluded Nigerians operate.

The risk isn’t just exclusion — it’s permanent exclusion. When AI systems flag legitimate users as suspicious because their behavior doesn’t match urban, connected patterns, those users don’t just lose access. They lose trust in digital systems entirely.

There are promising signals. Prembly is building a “Fraud Bank” where competing fintechs share threat intelligence. Local startups like Cybervergent raised $3M for AI security solutions built for African contexts. These approaches understand that fraud prevention and financial inclusion aren’t competing priorities — they’re interdependent ones.

The question isn’t whether Nigeria should use AI for fraud detection. It’s whether that AI can distinguish between suspicious behavior and the legitimate patterns of people the system was never designed to serve.

What would AI-powered fraud detection look like if it started with the 26% who are excluded, rather than the 74% who are already banked?