Certain residence-status notifications, such as changing employer, leaving an organisation, or graduating from an educational institution, may be submitted to the Immigration Services Agency online and are generally due within 14 days.
Mid- to long-term residents are required to notify the Director-General of the Immigration Services Agency whenever a change occurs to their affiliated organisation or their activities. Using the ISA's Online Notification System, notifications can be submitted online, 24 hours a day, 365 days a year, without visiting an immigration office in person.
As the need for notification and the documents required vary by status of residence and individual circumstances, it is important to check the requirements promptly when a change occurs and to complete the procedure within the deadline.
Source: Notification Concerning the Organisation to Which One Belongs (or One's Activities) | Immigration Services Agency / Immigration Services Agency Online Notification System Portal | Immigration Services Agency