I want to pay for a recent order on the t:connect portal and it’s asking for my CVV code. What is this and where do I find it?

The CVV Number ("Card Verification Value") on your credit card or debit card is a 3-digit number on VISA®, MasterCard®, and Discover® branded credit and debit cards. On your American Express® branded credit or debit card it is a 4-digit numeric code. The CVV code is typically located on the back of your credit or debit card and on the front of your American Express card.