Open your browser and type the safe and secure CardActivation.Citi.com URL.
Make sure the website shows “https://” with a lock icon.
Avoid clicking links from unknown emails or messages.
Use a private and secure internet connection.
Do not use public Wi-Fi while activating your card.
Use your personal phone or computer only.
Enter your card number and details carefully.
Double-check all information before submitting.
Never share your OTP, PIN, or CVV with anyone.
Follow the on-screen instructions to complete activation.
Wait for confirmation that your card is activated.
Enable SMS or email alerts for transactions.
Keep your login details private and secure.
Update your device with the latest security software.
Log out properly after finishing the process.