If you are an adult, you can invalidate your mandates on your own.
If you cannot identify in Suomi.fi e-Authorizations or invalidate mandates that you have granted independently for some other reason, you can apply for the invalidation of the mandates. Go to authorisation with an application
Identify yourself into Suomi.fi e-AuthorizationsOpens in a new window. using online banking codes, a mobile certificate, a certificate card or the Finnish Authenticator application.

Select "Act as yourself" as your role.

Click the Go to Suomi.fi e-Authorizations button.
On the Granted mandates page, you can see all assignees to whom you have granted mandates, and on the Received mandates page, you can see assignors from whom you have received mandates.
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.