US Patent 11531988 Fraud prevention tool

Various examples are directed to systems and methods for detecting fraud. A financial institution system may receive, from a transaction device, a transaction authorization request describing a transaction to be drawn on an account of a user. The financial institution system may also receive, from the user computing device, environmental data describing an environment of the user and determine that the environmental data indicates an anomalous condition. Based at least in part on the determining, the financial institution system may decline the transaction.