all imperforate, the five pieces of postage stamp currencies were usually ; 40 and 50 shahiv imperforate stamps are known to exist but are much rarer than the perforated versions. Additionally, the currency was printed on thicker paper than the stamps, and the notice saying that the post stamps "circulate alongside metal coinage" appeared on the reverse, unlike in stamps, where the other side was blank. Due to their weak protections, shahivky were often counterfeited, particularly the top two denominations. Due to their lightness and their propensity to be blown away by the wind, they have earned a tongue-in-cheek nickname of "butterflies" (), but were also known as "postage stamps" () in reference to their size and appearance. The shops of the time were known to be giving out change in bundles of hundreds of such stamp "coins". Directorate Following the fall of the Ukrainian State and the return to the Ukrainian People's Republic, represented by the Directorate, the government tried to shift focus to either of the two concurrent currencies in Ukraine, and finally officially declared hryvnias to be the "national currency". However, many more denominations were issued in karbovanets than in hryvnia in 1919. The government only managed to issue a so-called State Treasury Exchange Note () worth 5 hryvnias with a hastily prepared primitive design. It was the only state-sanctioned banknote ever printed on the territory of West Ukrainian People's Republic (ZUNR), or, to be exact, in Stanislaviv (now Ivano-Frankivsk). The banknotes were mostly circulated in eastern Galicia. Entering 1920, the circulation of the Ukrainian currency started to be curtailed. Already in January 1920, the Communists, who controlled most of Ukraine, ordered the banks to stop accepting all money issued by previous Ukrainian governments, including hryvnias, and removed the obligation to accept Ukrainian currency by private parties, while by the end of the same year, they forbade circulation of all Ukrainian money. It was nevertheless decided to order the last known emission of Ukrainian currency in 1917-1920, i.e. State Credit Notes denominated at 50 and 1,000 hryvnias, which were printed in Vienna. Few proofs () of these banknotes are known to exist, and they became obsolete before they could be ever circulated as Petliura dissolved the Directorate's government in November 1920 in light of the lack of control of Ukrainian territories. Local issues Apart from state-issued banknotes, there were also hundreds of local currency paper currency units