Flat money, commodity money, the gold standard and representative money is the money that would have the least value if people lost confidence in the government. Flat money is the currency that the government has declared as legal tender but it is not backed by a physical commodity. Representative money is any money that its face value is greater than its actual value. Commodity money is money whose value comes from the commodity in which it is made of. The gold standard is economic unit of account which is based on the fied amount of gold.