@article{fraudtypedecompositionandtheobservationm, title = {Fraud Type Decomposition and the Observation-Mechanism Taxonomy:Class-Specific Detection Limits in Payment Networks}, author = {Gaurav Dhama}, year = {2026}, eprint = {2605.31257}, archivePrefix = {arXiv}, url = {https://arxiv.org/abs/2605.31257}, }