Notification of changes in the health insurance company
You have to notify every change in address or name and also change in the family status to your health insurance company. You will then receive a new insurance card by mail. The old insurance card remains valid until you receive the new one.
Your health insurance company
The notification can be informal. Some health insurance companies also provide online forms on the internet. Ask you health insurance company about this.
No fees/charges apply.
In cases of doubt or if you have any questions or problems, please contact the relevant authorities directly.