You can retrieve your username via DBS iBanking. Please click Forgot " Username" on the login page to retrieve username. Get ready your: ATM Card number and ATM PIN, or Credit Card number and Card Expiry Date, or Cashline Card number and Card Expiry Date, or Secure Device You may also contact our 24-hour Customer Service Hotline at (852) 2290 8888 or complete and return the DBS iBanking Service Request Form to any of our branches to retrieve your username.