Is a credit card security code 3 or 4 digits? Security codes are typically three digits, but it could vary by card network. For example, American Express credit card security codes are four digits.

A credit card security code helps verify you have a physical copy of your card when you're making purchases online or over the phone. It adds a layer of safety against fraud, so guard it carefully.

Your credit card's security code is a three- or four-digit number that helps protect you against credit card fraud. Learn how to find it and why it's important.

A security code, sometimes called a CSC, CVC or CVV, is distinct from your PIN. A security code is a three- or four-digit number the issuer generates and prints on a debit or credit card.