Have you ever felt uneasy when someone on the phone asked for your credit card security code? Your instincts were on target. Just as most people keep their Social Security and phone numbers close to ...

Discover how credit card validation codes work and protect against fraud. Learn about their placement, security role, and examples to secure online transactions.

Credit card security codes are three-digit codes on the back of your card (four-digits on the front if you have an American Express card) used to verify that have the physical card. You typically ...