If you’ve misplaced both your Citibank username and password, call our support line at 1-833-392-7087 or click on the “Forgot User ID or Password?” link. Start by choosing the option to recover your User ID and follow the instructions to confirm your identity using your account number, credit card number, or ATM/Debit card number. If you encounter any problems, reach out to Citibank Forgot Username and Password support at 1-833-392-7087 for help.