The Euro is the official currency of the European Union. It has been in circulation as electronic currency since 1999 and as physical banknotes and coins since 2002. Its ISO 4217 code is EUR, and it is typically represented by the symbol €. The issuance and management of the Euro are jointly handled by the European Central Bank and the central banks of the individual countries within the Eurozone. Currently, there are banknotes in denominations of 5, 10, 20, 50, 100, 200, and 500 Euros. Additionally, there are coins in values of 1, 2, 5, 10, 20, 50 Euro cents, and 1, 2 Euros. The Euro ranks second globally in terms of trading volume, and all money changers in Hong Kong support the exchange between the Hong Kong Dollar and Euro.

The Singapore Dollar (SGD) is the official currency of Singapore, first introduced in 1967. It is identified by the ISO 4217 code SGD and is commonly represented by the symbols $ or S$. The issuance and management of the Singapore Dollar are overseen by the Monetary Authority of Singapore. Commonly used banknote denominations include 2, 5, 10, 50, and 100 dollars. Additionally, there are coins in denominations of 5 cents, 10 cents, 20 cents, 50 cents, and 1 dollar. All money changers in Hong Kong facilitate the buying and selling of Singapore Dollar.