Code 10 call or authorization request is the first step when suspecting fraud while the transaction is being authorized.
http://usa.visa.com/merchants/risk_management/code.html
There is no silly question when it comes to card processing. Just lots of confusion and frustration. My goal is to offer a reference place where good people can find answers or directions for common questions and issues. I sincerely hope it will help you. Everything is based on what I keep being asked about so all questions and comments are welcome. I am here to help! Don't hesitate to call.