The listing, bank of hells notes has ended.
50 million, 100 million,and 500 million bank notes
They are not play money though, and have a specific ritual purpose to be used at funerals. When a person dies, the money is burnt, in a careful way (either folded or put in an envelope, due to the concept that burning real money brings bad fortune). The basic concept is, as within other cultures where paper effigies of consumer products are burnt, that the money can be used in the afterlife.
Hell Bank money got its name from a loose translation of the ‘Underworld’, where the departed are said to go to atone for their mortal sins.