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We are still mending the queue in the phone services and you may have to wait 1-3 days for us to call you back. The national service numbers are serving in week 2 between 8am and 12pm until the queue is gone. SelfChat is closed until further notice. We regret the inconvenience caused due to the overloaded phone services.

Invoices sent to us should be sent as e-invoices. The FSHS’s electronic invoicing details are as follows:

OperatorE-invoicing addressOperator code

Maventa does not currently have an interconnection arrangement with OP Financial Group (Osuuspankki). If you send your electronic invoices via OP Financial Group, please enter DABAFIHH as the operator code.

The purchaser’s name and any other purchase reference data should be visible in the invoice details.

Electronic invoices can be sent by opening an e-invoicing account at