Please activate your new cards at citi.com/activate and safely destroy old cards. Everyone who received a new card should update their account information with any online retailers or subscription services where their old card information is stored.

When you get your new Citi credit card, you must activate it before you can use it. You’ll typically receive your card in the mail along with activation instructions. There may be several ways to activate it, such as by phone, online or via the Citi Mobile App.

Activating a credit card is usually a quick and simple process. Here, we’ll discuss how to activate your credit card, including what happens afterward and how to handle hiccups along the way.

3 ways to activate your Citi credit card

When you receive your credit card, you’ll get a letter explaining your activation options. Your new card may also have a sticker with activation instructions. You may have several options to activate your card, including online, by phone or in the Citi Mobile App.

The exact steps you’ll follow will depend on the method you choose. You may have to provide personal information (like the last 4 digits of your Social Security number or date of birth) as well as your card’s information (like the security code).

Method 1: Online

• You can choose to navigate to Citi.com/activate and follow the instructions to activate your card.

• Go to Citi.com/activate using a secure browser. Citi’s official website provides the online activation option. 

• Follow the instructions displayed on the activation page. You may be asked for information such as your card details and personal verification information.

• Enter the requested details carefully. Citi may require information such as your date of birth, security code, or other identifying information depending on your account. 

• Review the information and submit the activation request. Once the process is successfully completed, your card should be ready to use.

Method 2: By phone

You can also activate your card by phone by calling the number on the back of your card. You may be prompted to enter certain information, such as the last 4 digits of the card or your date of birth.

Method 2: Activate Through the Citi Mobile App
You can also activate your card through the Citi Mobile App. Open the app and follow the card activation prompts. Citi documentation indicates that card information such as the card number, security code, date of birth, and last four digits of your SSN may be requested during registration/activation.

When can you use your citi credit card after it’s activated?

Tip: Never share your full card number, CVV, PIN, or one-time verification code with someone claiming they can activate your card for you.

What if you don’t activate your credit card?

If you receive a new credit card but don't activate it, the card generally cannot be used for purchases. However, not activating the card does not necessarily mean that the underlying credit-card account is automatically canceled.

What Happens If You Don't Activate It?

• The card may not work: Purchases made with an unactivated card will generally be declined.
• Your account may remain open: The credit-card account can continue to exist even if you haven't activated the physical card.
• Fees may still apply: Depending on the card's terms, annual fees or other account charges may still apply even if you don't activate the card.
• You may receive reminders: The issuer may contact you or send reminders asking you to activate the new card.
• You may need a replacement: If the card was lost, damaged, or you no longer want to use it, contact the card issuer rather than simply leaving it inactive.

Should You Activate a New Citi Credit Card?

If you intend to use your new Citi card, activate it through an official Citi activation method. If you don't want the card, contact Citi and ask about closing or canceling the account rather than assuming that failing to activate it will automatically close it.

Important: Don't throw away a card simply because you haven't activated it. If you don't intend to use it, securely destroy it only after confirming with the issuer what you should do with the account.

What to do if you have trouble activating your citi credit card?

If your new credit card won't activate, don't worry. Activation problems are often caused by incorrect information, website or app issues, or a temporary security check.

Steps to Fix Credit Card Activation Problems

1. Check the information you entered
Make sure the card number, security code, date of birth, and other requested details are entered correctly.

2. Try the official activation website again
If you're activating a Citi card online, make sure you're using the official Citi website and a secure, up-to-date browser.

3. Try the Citi Mobile App
If the website isn't working, try activating your card through the official Citi Mobile App.

4. Check your internet connection
A weak or unstable connection can interrupt the activation process. Try again using a reliable connection.

5. Look for account or security alerts
Citi may require additional verification if it detects unusual activity or needs to confirm your identity.

6. Contact Citi customer service
If you still can't activate your card, call the customer-service number printed on the back of your card. A Citi representative can check the card status and help resolve the issue.