If you've forgotten your Citibank username and password, call us at our helpline 1-888-388-4751. Start by visiting the Citibank login page and clicking on "Forgot User ID or Password?" Follow the prompts to retrieve your username by entering your account details and registered email or phone number. To reset your password, enter your username and follow the instructions to verify your identity using an OTP sent to your registered mobile number or email. Once verified, you can create a new password. If you need further assistance, contact Citibank Username And Password Forgot number at 1-888-388-4751.