You can change your appointment at least 1 day before the scheduled appointment date. The system will only allow you to change your appointment four times. If you have exceeded this quota, you will not be allowed to make any new appointment or make further changes to your last appointment.

You need to enter the following information:
(1) National Registration Identity Card (NRIC) Number
(2) Number of people applying for REP/COI (e.g. including family members)
(3) Contact Number

After keying in the required information as listed above, click on the submit button (shown below).

You will see the following screen once you have successfully logged into the e-Appointment system.

The box highlighted in orange shows your current appointment date if you have already booked an appointment.
You will not be able to click on the days highlighted in grey (appointment slots have been fully booked), pink (non-working days) and white (dates not released/available for booking).

To change your appointment, click on your preferred date (those available in green) and the following screen will be shown:

Select your preferred timing (check on the radio button) and click the submit button.

When your preferred timing has been successfully accepted, a confirmation message will be displayed. You are advised to adhere to the new appointment timing.

Once you have changed your appointment, you are required to print the appointment acknowledgement page (shown below). Please bring this print-out along for your appointment to retrieve your queue ticket at the Self-Service Ticketing Kiosk.

I have booked an appointment to collect my passport. Can I change my existing appointment?

Related questions

I have booked an appointment to collect my IC. Can I change my existing appointment?

When is my Singapore citizenship registration appointment after my application is approved?

Can I change my appointment for Completion Of Formalities (COF)?

How can I change an appointment to submit REP/COI application?