Bid Forms - Security Code information

What is the Security Code?

It is an important new Internet security feature that now appears on the back of most Visa / MasterCard / JCB / Switch / Solo cards, and on the front of American Express cards. This new code is a three or four-digit number which provides a cryptographic check of the information embossed on the card.
The security code helps validate that the customer placing the online order actually has the credit card in his/her possession, and that the credit/debit card account is legitimate.