The seven-year deal will see the SAS Fraud Management system used to protect millions of debit cards, by uncovering fraudulent transactions faster, earlier and more accurately.
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It will examine each and every HBOS debit and ATM card transaction in real-time, checking it against any possible changes in customer behaviour to make a decision as to whether or not to proceed with the transaction.
The SAS fraud system provides the option for HBOS to extend its use to cover other types of transactional fraud which may affect HBOS' customers, including banking and credit card fraud.
"We chose SAS over the competition because of its proven expertise in the fraud management space and its potential to provide a single platform that can be extended throughout the enterprise, meeting many of our fraud prevention needs," said Ian Fielder, head of risk operations at HBOS.