as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
how do credit card banks detect fraudulent transactions without requiring a travel advisory?
user
one bank is more willing to risk losses and customer hassle in exchange for lower processing costs than the other bank is. it's strictly a business decision. regarding how they detect suspicious transactions: patten detection based on your past usage history. i've gotten calls asking me to confirm that i just placed a large order with a company i'd never bought from before, or in a country that i haven't previously visited, or...
assistant