This is money that you burn and send down to Hell in front of you. By the time you die - and assuming you're going down instead of up - you can build up a nice account for yourself down there for, well, whatever is on sale down in Hell (You think there is a Hellmart?). You can also burn Hell notes to send down to other people who might be down there, but hey, why bother with charity if they're already in Hell?
There is no equivalent Heaven note. Does this mean Hell is capitalistic and Heaven a commune? I shudder just thinking about it. I'll just assume that Heaven doesn't have any scarcity, so has no need for money.