Question: what happens if one overstays the voa in Iran? The airline i plan to use only flies there once a week and if i get the return flight two weeks later, i'd have stayed for 15 days, which is one day after VOA expires.
Answer: If you exit Iran later than the expiration date of your visa, at least you will be asked to pay about $50 as a penalty per day. So you shold extend your visa a few days before the expiration. For Iran visa fill in the visa form on http://www.uppersia.com/Iran-travel-services/iran-visa.html, it takes about 10 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.