If you have forgotten User ID / Password, please reset them with below steps.
First Time User
If you have already got User ID/ Password for Citibank Online desktop version, you can login Citi Mobile App with the same User ID/Password.
For first time user of Citibank online services, you have to set up your User ID/Password at www.citibank.com.hk via desktop/laptop computer by just a few clicks:
1. Visit www.citibank.com.hk via desktop/laptop computer
2. Click "Sign On"
3. Choose "First time user"
4. Enter information* required to create online User ID & password
*For credit card only clients, you can create your online User ID & password with your credit card and date of birth.