Exonumia is numismatic items other than coins and paper money. Examples would be tokens, ration tickets, and medals. Also included (at least from my perspective) are “short snorters”, since the importance of them is only partially related to the fact that they are paper money.
The Japanese government, as well as their puppet government, both issued various commemorative medals and coins during the Philippine occupation. Santo Tomas internment camp had meal stamp cards.