You’re at the checkout screen after an online shopping spree, ready to enter your credit card number. You type it in and instantly see a red error message ...

All mainstream credit card numbers obey a mathematical trick designed to catch the most common typos. It’s called the Luhn algorithm, named after IBM researcher Hans Peter Luhn, who patented it in ...

Millions of businesses process credit card transactions every day, and those businesses need a way to check to see if a credit card is active or not or if it's a fraudulent card. The issuing ...

Most of us are curious beings by nature. So, if you've been staying awake at night wondering what your 16-digit credit card number means, it's your lucky day. I'm going to pull back the curtain and ...

Kelly-Ann Franklin has spent more than two decades in journalism which has helped her build a wide knowledge base of business and personal finance topics. Her goal with editing is to ensure tough ...

Your credit card number isn’t just a random string of numbers. It identifies the credit card issuer, financial institution and your account. It also validates your card for security purposes. Many or ...

Aaron Broverman is the Managing Editor of Forbes Advisor Canada. He has almost 20 years of experience writing in the personal finance space for outlets such as Bankrate, Bankrate Canada, ...