The type of money the economy used, wherein certificates were used instead of silver would be called representative money.
Representative money is any medium of exchange. It was often printed on paper, normally called paper money. This could be exchanged for the commodity behind it. For instance, after the war, the population continued exchanging certificates instead of converting them to silver.
As the representative money is tied to a physical object, it is quite less prone to depreciation by inflation. This money is backed up by one or the other different things of value.
Hence, the type of money wherein certificates were used instead of silver is called representative money.
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