Fraud-prevention AI demos dazzle, then meet reality - the bank's wire, ACH, card, and instant-rail data live in separate systems. A model that cannot see the whole customer cannot catch a fraudster who moves across all of them.
A build note from a RAG document system tested on real content. The retrieval was the easy part; the document lifecycle - incremental add/delete and domain separation - was the real work.
The AI opportunity in banking is not another chat window. It is a decision layer that chooses the right payment path before money moves.