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 ...

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 ...

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 ...

Here’s a fun trick to entertain friends and win bar bets: Guess the first number on somebody’s credit card tucked away in their wallet. You can do that because credit card numbers aren’t random. Using ...

Liliana Hall was a writer for CNET Money covering banking, credit cards and mortgages. Previously, she wrote about personal credit for Bankrate and CreditCards.com. Some card details on this page may ...

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

Sophie Venz is a former Deputy Editor at Forbes Advisor. She is an experienced editor and features reporter, and has previously worked in the small business and start-up reporting space. Previously ...