Card security codes

Card security codes, often known as CVV (Card Verification Value) or CVC (Card Verification Code), are three or four-digit numbers printed on credit and debit cards. They serve as an additional security measure to verify that the person making a transaction has the physical card in their possession. For most cards, the CVV is located on the back, while American Express cards have it on the front. When making online or phone purchases, merchants may ask for this code to help prevent fraud and unauthorized transactions, enhancing overall security in the payment process.