You can donate to the University of Helsinki online or by bank transfer.
University of Helsinki has a money collection permit (RA/2017/1340), permitted by the National Police Board on 21 December 2017, and it is valid 1 January 2018 – 31 December 2022. The permit covers all of Finland, with the exception of Åland. The funds will support the tasks given in §2 in the Universities Act (558/2009). University of Helsinki is responsible for the fundraising.