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
challenged an apparently bogus credit card charge, what happens now?
user
yes.  for $15 it's not worth anyone's time to dig deep just for this specific occurrence. what you should do, however, is keep an eye on your credit card bills and accounts and watch for any other suspicious activity.  it is possible that your number was stolen somehow and someone is using it fraudulently, so you want to be on the lookout in case they try to use it again.  however, your credit card company is going to be much, much better than you at detecting patterns of fraud, which is why you should leave it to them unless and until you actually see more suspicious activity.
assistant