Japanese government–issued Philippine peso

During World War II in the Philippines, the occupying Japanese government issued a fiat currency in several denominations; this is known as the Japanese government–issued Philippine peso (see also Japanese invasion money). The Japanese government outlawed possession of guerrilla currency, and declared a monopoly on the issuance of money, so that anyone found to possess guerrilla notes could be arrested or even executed.

Source: Wikipedia — Japanese government–issued Philippine peso (CC BY-SA 4.0)