It is only after the service payment that the visa formalities request will be processed by our staff and you will receive the visa reference code in a maximum delay of 5 working days (Fridays are weekend in Iran). The service fee excludes the visa fee, which must be paid at the time of collecting the visa at the place of issue.
You can also find the Reference Code in your provided email. The payment will be done online securely through PayPal portal either with your PayPal account or with a Credit Card (Bank Card).
You can find more information about Iran visa here.