To cancel your Discover credit card, you'll need to call their customer service number, which can be found on the back of your card or on their website. Don't worry, the representative will walk you through the process, and it should only take a few minutes. Just make sure you have your account information handy, so you can verify your identity.
When you call, be prepared to explain why you're canceling your card. This is just a routine question, and it helps Discover understand how they can improve their services. Be honest, but also be polite – you never know when you might need to come back to Discover in the future!
Once you've canceled your card, you'll need to destroy it, so it can't be used again. This is an important step, as you don't want anyone to get their hands on your old card and try to use it. Just cut it up, shred it, or do whatever you need to do to make sure it's gone for good.