Mandates can be invalidated independently by any of the guardians entered in the population register when the assignor is a minor.
If the guardian cannot independently invalidate mandates, the mandates can be invalidated in the mandate service provided by officials. Go to authorisation with an application
Identify yourself into Suomi.fi e-AuthorizationOpens in a new window.s using online banking codes, a mobile certificate, a certificate card or the Finnish Authenticator application.

Select "Act on behalf of another person" as your role.

Select the underage child whose mandates you want to invalidate.
Click the Go to Suomi.fi e-Authorizations button.
On the Granted mandates page, you can see all assignees to whom mandates have been granted.
You can select one or more parties and invalidate all their mandates. When you click on a party's name, you can select individual mandates that you want to invalidate.
Finally, click on the 'Invalidate mandates for the selected' button.
The invalidated mandates go to the Expired mandates page, where they are displayed 15 months after the expiration date. The assignee will not be notified that the mandate has been invalidated, so you must notify them of this where necessary.