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Graph-Transformer Fraud Detection with Self-Supervised Pretraining and Conformal Risk Control

arXiv · AI, language, vision and robotics · article · Sep 13, 2026 · UTC

Financial fraud in corporate transaction networks has grown more coordinated and harder to detect with rule-based engines and with classical learning models that treat each transaction in isolation. This paper presents GTFD, a graph-transformer fraud detector that fuses structural and temporal evidence from a corporation's payment graph. GTFD encodes the graph with a multi-head graph attention network, encodes ordered transaction sequences with a gated transformer, and combines both views through a cross-modal gating layer. A conformal risk-control head converts the fused representation into t

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