Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Challenged an apparently bogus credit card charge, what happens now?
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.