Iranian embassy in Armenia issued a statement, saying that, “Given implementation of the MOU on lifting visa requirements approved on August 6, 2016, between the Islamic Republic of Iran and the Republic of Armenia, nationals of the two sides would never need visa for arrival in the two countries.”
Citizens of the two sides could stay in Iran and Armenia 90 days without visa, according to ISNA.
Azeri embassy in Iran used to issue visa for Iranians in a day.