Paper money consists of three types, these are:

1. Intrinsic paper money: These are bank notes representing a certain amount of gold and silver, either coined or in bullion, deposited in a specific place, which have a metallic value equal to the nominal value held by these notes, and can be exchanged on request. In such a case, the circulation in real terms is like that of metallic money, with the paper money circulating as a substitute for metallic money.

2. Fiduciary paper money: These are “convertible” notes where the undersigned promises to pay the bearer on demand a certain sum of metallic money. The value of these fiduciary notes when put in circulation, would be subject to the trust, people at large, have in the undersigned, and on the ability of the undersigned to fulfil the promise. If He were trustworthy and reliable then it would be easy to use this fiduciary paper money just like coins.

The main type of this money is the bank notes issued by well-known banks and trusted by the public. However, the issuer of these bank notes i.e. this fiduciary paper money, be it a bank or the State’s treasury, maintains an exact amount of gold equal to the value of the bank notes, as is the case with the intrinsic paper money. It usually maintains gold reserves in its vaults equal to a certain percentage of the issued bank notes value which could amount to three quarters, two thirds, a third, or a specific percentage. Therefore, the quantity of bank notes which is backed by an exactly equal value of metallic reserves is considered intrinsic paper money, whereas the rest of the quantity which is not backed by a reserve would be considered fiduciary paper money, which derives its power of circulation from the trust which people have in the undersigned. For instance, if an issuing house, be it a bank or government treasury, would keep a metallic reserve in its vaults worth 20 million Dinars, and issues paper money worth 40 million Dinars, then the 20 million of bank notes i.e. paper money which is not backed by a metallic reserve would be considered fiduciary paper money and the twenty million Dinars worth of paper money, which is backed by a metallic reserve, equal to its value, would be considered as intrinsic paper money.

Therefore, for the State that holds reserves of gold and silver exactly equal to the value of the paper money it issues, its money would be considered as intrinsic paper money and fully backed money.Whereas, for the State that holds a value of either gold or silver which is not equal to the full amount of paper money, but is only partially covered, its money would be considered as fiduciary paper money.

3. Inconvertible paper money: These are known as compulsory bills i.e. legal tender with enforced acceptability, and are also commonly called paper securities. They are issued by governments and established as main currencies. They cannot be exchanged to gold or silver, nor are they backed by a reserve of gold, silver or bank notes. However, they are backed by government legislation exempting the issuing house from their exchange against gold or silver.