Cookie Notice
By accepting all cookies, you ensure the best possible user experience. Read more about cookies and their use or change your cookie settings.

How to grant a Suomi.fi mandate easily and quickly

When you are setting up a new business name or want to transfer your current business name to Truster, we first need to have Suomi.fi authorisation. This authorisation allows us to complete the process for you quickly, easily and securely.

Instructions to grant the mandates below👇

1. Go to from this link suomi.fi service and select Identification Log in to the service using your Finnish online banking ID or mobile certificate. 

2. Select Act as yourself

3. Click Go to Suomi.fi e-Authorizations

4. Click Proceed to validate (1)

5. Click Validate mandate

✅ Done! 

Once you have confirmed your authorisation, we can set up your business name or automatically retrieve your existing business name details. This is a quick and easy way to get started! 🚀

⚠️ Note: This is the first mandate we need. At the end of the process, we will ask you for a second set of mandates- the company mandates. We will send you more information and instructions when this step is due, so there is no need to do anything yet.

Does using a substitute affect my taxation?

Read the guide ->

Vehicle taxation

Read the guide ->

How do I add expenses?

Read the guide ->

How does accounting work with Truster?

Read the guide ->

Where can I find my company details?

Read the guide ->

What expenses can I add to my accounts?

Read the guide ->

What does the Pro Light service cost?

Read the guide ->

How does income tax work on Truster Pro Light ?

Read the guide ->

How Truster handles YEL insurance

Read the guide ->

Who has to take out YEL insurance?

Read the guide ->

Payment transactions in Pro Light

Read the guide ->

Have you received a request for information from the Immigration Service?

Read the guide ->

Downloadable commission agreement for a sole trader

Read the guide ->

How do I subscribe to Truster Pro Light ?

Read the guide ->

Creating an invoice

Read the guide ->

I already have a business ID, can I use Truster Pro Light ?

Read the guide ->

In which registers will the business name be registered?

Read the guide ->

Company data management

Read the guide ->

Suomi.fi - Company mandates

Read the guide ->

Suomi.fi - Personal mandates

Read the guide ->

Important dates for an entrepreneur

Read the guide ->

YEL insurance

Read the guide ->

Business reports for the self-employed entrepreneur

Read the guide ->

How to set up a direct debit

Read the guide ->

Subcontractor: How to share your information with the main user

Read the guide ->

Advance taxes Truster Pro Light - service

Read the guide ->

How do I handle receipts

Read the guide ->

Kilometre allowances in 2025

Read the guide ->

I have a substitute, how do I split the bill?

Read the guide ->

Mileage allowances for self-employed persons

Read the guide ->