The CVV code or security code is 3 to 4 digit number on the backside of your credit card. This code provides additional security for your protection.

It is an important new Internet security feature that now appears on the back of most Visa/MasterCard and Discover 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.

If this code is printed on your card, then YES, you must enter the code. Visa, MasterCard, and Discover are now starting to require Internet stores to obtain the security code for all cards that have a code printed on them. In order for this transaction to be accepted and processed, you must enter this code if it's printed on your card. This is done for your protection.

For Visa/Mastercard and Discover owners, flip your card over and look at the signature box. You should see either the entire 16-digit credit card number or just the last four digits followed by a special 3-digit code. This 3-digit code is your Card Security Code. View example here.

The security code is only printed the card and it is not contained in the magnetic stripe information nor does it appear on sales receipts or billing statements - you must have the card in your possession in order to use this code. Card Security Codes are not raised, so they are not scanned into standard credit card readers. In theory, these numbers are only visible to you.

CVV stands for Credit Verification Value. It is a new method for your bank to protect your account from fraudulent transactions. This is a 3 to 4 digit number found on all credit or debit cards but it is not embossed or digitized on the card. Therefore, only the cardholder has this information. Most internet sites do not require this information but we do to protect your valuable credit and our merchandise.

The goal of virtualCART security is to achieve one thing: Deliver credit card information from the customer to the merchant with the minimum possibility of exposure to prying eyes. Our primary tool for this is the utilization of secure data encryption. We encrypt the information between the customer and the cart, and then you retrieve credit card information the same way.

You will need to instruct the compiler where to find the cairo.h file, (generally something like -I /usr/include/cairo), and tell the linker where to find the cairo library and to link with it, (often something like -L /usr/lib -lcairo). But the exact flags and paths will depend on your compiler and your installation of cairo. To simplify this, cairo uses pkg-config which can help you determine the correct flags to use. If you have pkg-config installed, then you can compile the above hello.

The CVV (Card Validation/Verification Value) or CCV (Credit Card Validation/Verification), whatever you want to call it is simply an anti-fraud device designed to protect cardholders. This code is an added level of security that is intended to verify that the physical card is actually in the person’s possession. Get help with locating the CVV or CCV code in this diagram.

VISA, MASTERCARD & DISCOVERY: You can find your card verification code on the reverse side of your credit card, printed into the signature field. It is a 3-digit group for MasterCard, Visa, and Discovery. The American Express Card verification code is a 4-digit number printed on the front of your card. It appears after and to the right (above) of your card number.

Zip Code entry is required for any and all United States Addresses. It is not required for other countries.