In anticipation of Estonia's Independence Day, the Estonian National Museum (ERM) has initiated a campaign encouraging citizens to search their homes for specific rare banknotes from the ZZ series of the Estonian kroon. The museum is currently missing seven particular notes that hold significant historical value, and these notes are viewed not only as missing pieces of a collection but as integral components of Estonia's journey towards restoring its independence. ERM's representative, Riina Reinvelt, highlighted the importance of preserving the history of the Estonian crown in its entirety.

The museum's banknote collection, which was notably expanded in 2011 following a donation from noted researcher and collector Allan Tohv, originally contained 305 different banknotes issued between 1992 and 2010. The collection was further enhanced by the addition of 27 more notes from the Bank of Estonia. Since a public appeal in 2012, the museum has seen donations from many individuals that have significantly enriched the collection. However, despite these efforts, seven notes from the ZZ series remain elusive, including the rare five-kroon and ten-kroon notes from 1991, which are pivotal to understanding the full scope of Estonia's monetary history.

The effort to find these rare banknotes not only aims to complete the museum's collection but also reinforces the cultural heritage associated with the Estonian kroon, which was used prior to the adoption of the euro. The call for the public's assistance underscores the importance of community involvement in preserving national history, as every contribution could help fill critical gaps in understanding Estonia's past and the monetary instrument that played a crucial role during the country's path to independence.