1. A legitimate doctor's report (Cause of death and time)

2. Preparing a report from the section for Department of Foreign nationals from the Iranian Ministry of Interior, and addressed to Iranian customs.

3. Customs will carry out the necessary procedures.

4. Bringing a certificate of death from the hospital, and ratifying it before the Iranian Ministry of Foreign Affairs and the Qatari embassy in Tehran.

5. The Embassy will send a letter to Qatar Airways stating that it does not mind sending the body aboard Qatar Airways and onwards to Doha.

6. The Iranian Ministry of Foreign Affairs will send the deceased's passport to the embassy, which in turn will send him to his family.

Yes, Qatari nationals can obtain visas through Iranian diplomatic missions around the world, with a 90-day span, just as they can obtain one through the airport for the same duration.

1. Informing security forces (the police) about the loss of the passport, who will in turn submit a report to the Iranian Ministry of Interior.

2. Informing the Qatari embassy about the loss of the passport, and the embassy will get permission from the Iranian Ministry of Interior to issue a pass-through ticket. The Iranian Ministry of Foreign Affairs will ratify the pass-through ticket, and allow the person to return to Doha.

3. The pass-through ticket is exclusively issued in the event of losing a passport.

The document must be issued from the relevant authority exclusively in the Farsi language, which will then be translated to either the Arabic language or the English language, and after its ratification by the notary and the Iranian Ministry of Foreign Affairs, the embassy will then exclusively ratify the seal of the Iranian Ministry of Foreign Affairs.

The request for a Qatari national marrying a female Iranian national will be submitted (and the opposite of that as well is true) to the Iranian Ministry of Interior. After getting approval, the married couple will then go and legitimize it under Islamic law, and the speeches will be translated to the Arabic language. Afterwards, the notary and the Iranian Ministry of Foreign Affairs will give their approval, and the embassy will exclusively ratify the seal of the Iranian Ministry of Foreign Affairs. 

The two services do not officially work in Iran, but there are companies (a third party) who undertake the operations that are related to these companies.

Yes, and it is through the biggest telecommunications companies in Iran (First Hamrah), or (MTN Oransal) and the quickest services available through 4G (LTE).