The dobra is the official currency of the São Tomé and Príncipe since 1977, when it replaced the escudo. The name derived from Portuguese “dobra” which means doubloon (double). In 1977, the Banco Nacional de São Tomé e Príncipe introduced notes in denominations of 50, 100, 500 and 1000 dobras, followed by 5000, 10,000, 20,000 and 50,000 dobras note in 1996. In 2018, the Central Bank of São Tomé and Príncipe (Banco Central de São Tomé e Príncipe) announced a redenomination of the dobra and second series of notes were issued in denomination of 5, 20, 50, 100 and 200 dobras.
In 2009, the government of São Tomé and Príncipe signed a loan contract with Portugal, which aimed to link the dobra to the euro. This measure would guarantee economic stability in the country and make the country attractive for foreign financial investment.
The 20 São Tomé and Príncipe dobras note front design features the charaxes barnsi butterfly with different animal sketches around it and a stamp with a butterfly figure. In the background, is presented a view of the main building of the Central Bank of São Tomé e Príncipe in São Tomé (capital). The reverse of the note illustrates a São Tomé giant treefrog, the map of S. Tomé and Príncipe with the political division and location according to the equatorial line, different sketches of the Acraea insularis butterfly, a stamp with a butterfly figure, and a cacao fruit stamp. Both sides of the note preset the lettering and the denomination in the Portuguese language. This note is part of the 2016 series, and its color is green on a multicolor underprint.
Text: Vinte Dobras Ministerio das Finanças, Comércio e Economia Azul, Governado Do Banco Central, Unidade, Disciplina, Trabalho, Decreto Lei No. 06/2016 De 21 De Outubro De 2016, Banco Central S. Tomé e Príncipe, Vinte Dobras, Rã de S. Tome (Hyperolius thomensis), Banco Central S. Tomé E Príncipe, Princípe, Santo Antonio, S. Tomé, neves, Guadalupe, São Tomé, Trindade, Santana, São João dos Angolares, Equador. 20.