Features With Real Predictive Power
Engineer features that summarize behavior over time and context. Combine velocity across identities, graph links between cards and emails, device reuse patterns, issuer response codes, and 3DS outcomes. Encode booking distance from service time, provider load, and policy visibility. Extract text signals from customer notes using light embeddings to catch refund‑seeking language. Most importantly, label carefully using outcome windows, reason codes, and verified service completion, to avoid training on noise.