The University of Helsinki will only take eelctronic invoices from Finnish suppliers from now on. In the new year, the bursar's office will start reminding suppliers sending us bills that paper invoices (invoices scanned by Itella) will not be welcome and that invoices must be sent directly to the electronic billing address of the university in future. Travel invoices, staff expenses, and suppliers from abroad are exempt from electronic billing.
 

Electronic billing address: http://www.cs.helsinki.fi/en/administration/invoices