If you forgot your Citi card PIN, retrieve or reset it by logging into your Citibank online account or mobile app. Go to the "Card Services" or "Account Management" section and select "PIN Services" or "Forgot PIN." Verify your identity with a one-time password (OTP) sent to your registered phone number or email. Follow the instructions to set a new PIN. Alternatively, contact Citibank customer service for assistance. This process ensures you can securely regain access to your Citi card PIN and continue using your card without any disruptions.