To activate a Citibank card without the physical card, log into your Citibank online account or mobile app. Go to the “Card Services” section and find the option for card activation. Follow the prompts, which may include verifying your identity through personal information or answering security questions. You might also need to use a one-time code sent to your phone or email. Once verified, your card will be activated and ready for use. If you encounter any issues, contact Citibank customer service for help.
