The current study affirms that fals were important currency in the Islamic monetary system.
The state paid to them a similar interest to that of the main currency (dinar and dirham). This
was greatly manifested by the interest paid by the Umayyed state when the pure Arab type of
fals was introduced that had a fixed exchange rate for the dirham and was directly supervised
by the state. Additionally, the state exploited their diffusion and using them as a subsidy to
dinar and dirham. They were also utilized as a fast media and a formal document used by
people to ask for their rights if exploited.