I typically accept credit cards in person or over the phone, so I get a personal authorization to use the card, but I have a new customer out of state that has sent his billing address and credit card info via email on a large order. Our email correspondence history outlines the quote details, and contains his email with the card information - is this enough authorization to charge the card that he supplied, or do I need to get additional information from him? I just want to make sure I'm not charging a fraudulent card that will get charged back or wind me in some sort of trouble with it.