Question: Do Iran Consulates accept the visa code only within 1 month of it's issue?
Is the visa validity only for entry into Iran? So can you entry just before the visa validity expires and then stay for however many days the consulate has given you?
Answer: For Iran visa you should 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.
You should refer to the embassy in a month to collect your visa, after issuance you have 3 months time to enter Iran.
Check the cheapest Iran tours at http://www.uppersia.com/Iran-tours