I agree, the name "Obligatory Bills" isn't simplistic enough. Some form of "IOU" would be easier to understand and more consistent with the item's description.
At the same time "Promissory Note" isn't quite right either since that term describes a document that promises a
monetary payment while the description of a P Note says "Promissory notes are not supported by government is covered only by residents." (This description should actually say "Promissory Notes have no value to the government; their value is determined by AfterWorld's residents.")
