How Hybrid Intelligence Defeated Fraud in a Fast Growing P2P Marketplace

Balancing massive user acquisition with a “human-in-the-loop” defense strategy to stop account takeovers in real-time

RESULTS

99% accuracy
In identifying fraudulent activities
79% increase
In cases handled per analyst

Rapid growth often outpaces platform safety, leaving users vulnerable to sophisticated fraud. A blend of human forensic expertise and AI stabilizes the ecosystem.

The challenge
When growth outpaces platform safety 

Scaling a global marketplace requires a defense that grows as fast as the user base. For a London-based peer-to-peer (P2P) platform, rapid expansion had opened the path to account takeovers and transaction fraud — complex threats that plague the industry. 

To sustain growth and protect its community, the platform needed to move beyond basic moderation and implement a deeper, forensic level of screening. The goal was to spot bad actors in real-time without creating friction for legitimate buyers and sellers.

The solution
A hybrid intelligence defense

To stabilize the platform and harden its defenses, we deployed a rapid-response framework that transformed the fraud department and instituted a proactive layer of security, including:  

  • Agile resource deployment: Mobilizing a dedicated internal resource team with specific and solid past expertise in P2P transaction patterns and fraud
  • Performance-driven quality gates: Establishing rigorous toll gates from training to nesting phase, ensuring every analyst meets 100% accuracy before entering the live environment
  • Human-in-the-loop optimization: Pairing AI tools with the platform’s human experts to catch subtle fraud that automated systems usually miss 
  • Strategic process consulting: Partnering with the client’s SMEs to share emerging trends and recommending improvements to the overall process 

Results

By aligning our operations with the client’s internal culture and rigorous quality standards, we moved beyond a traditional vendor relationship. Our hybrid intelligence model achieved 99% accuracy in identifying fraudulent activities, ensuring the platform remains a trusted space for its millions of users.

Operational efficiency surged alongside safety. We delivered a 79% increase in cases handled per analyst. This scale allowed us to consistently meet all in-house productivity and quality KPIs while expanding into high-complexity workstreams that include global chargeback management and ATO protection.

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