0 Euro - Suomen Presidentti - Mauno Koivisto

Mauno Koivisto, Finland's president from 1982 to 1994 and the country's first Social Democrat to hold the office, died in May 2017. This souvenir note was issued four years later as part of the EuroSouvenir programme, which licenses the zero-euro format to cultural and commemorative publishers across Europe — the notes are printed by Oberthur Fiduciaire under the same security specifications as genuine euro banknotes, including the distinctive feel of the paper, though they carry no legal tender status anywhere.

Oberthur's involvement is the main point of interest here: the production quality is indistinguishable from circulating currency, which is precisely the commercial appeal of the series.