You can try to create a fake credit card number but you won't get far. The shopping carts on websites that would require a credit card number are directly linked to a credit card processor. This will instantly check the credit card to see if it is a valid number. Most sites now also ask for the three digit number that is found on the back of the card called a CID. This is to prevent people from
. using credit card numbers that aren't theirs. For information on credit card fraud, go to http://criminal.findlaw.com/crimes/a-z/credit_card_fraud.html.