Question: I was going to send my registration for the Iranian visa to either the embassy in Ankara or to Istanbul. Which is easier?
Answer: Istanbul usually is more efficient to get the Iran visa stamp in your passport. Fill in the visa form on Iran visa application, it takes about 3-7 working days to get your reference number and two working days to collect your visa at the embassy by direct referral or one working week by posting the docs to the embassy. You can pay the visa fee in cash in Iran.