Most if not all Online purchase already require you to input your address and your 3 pin ID already. If you registered your CC at Amazon for example they already have all your info but need the 3 digit PIN code for verification. So if someone wanted to sacm you they just hack Amazon and they got your CC. So your concern is well placed but if you made purchase online already and have a online account with a seller like eBay or Amazon your info is there already.why would you need my address and phone number name of bank and so on when all you should need is card number and email and three dig on back of card scares me to be thinking mabe this is a scam trying to get to much info!