The Currency of Iran:
The Credit Cards such as VISA Card and Master Card cannot be used in Iran except in small numbers of Hotels and since the payment is an online procedure empowered and secured by Network International so you have to activate your online payment for your credit, Instead we suggest to have enough cash with you. Dollars and Euros are good options. As soon as you arrive in Iran at the currency exchange Office in Airport, Hotels or in the City area , you can easily exchange your money at the current rate.
-Caution: In Iran in addition to the currency of IRR there is another currency named Toman which has not been printed. There does not exist any banknotes and coins. But most of the people use and talk about this currency. So always be sure if the prices in the shops are in Toman or Rials.To convert Toman to IRR, just insert one imaginary zero front of price to Toman, then you will have the price in IRR (For example every 10,000 IRR equals to 1,000 Toman).
The approximate current value is
1 USD = (34800 IRR)
1 EUR = (38000 IRR)
1 CHF = (35000 IRR)
Central bank official rate is 1 USD = (30000 IRR)