Iran is not a member of the Hague Convention countries. Four main steps are needed to achieve the legalization of the Irann embassy.  The apostille is the last step for all the countries participating in The Hague.

Iran is not a country in The Hague. For this reason, your document must also be certified by the U.S. Government and legalized by the Irann embassy.

So, if you have an Iran birth certificate that was issued in Iran and want to use in USA, you must send your birth certificate to Iran, obtain certification from the Irann Department of Foreign Affairs and legalize it at the USA Embassy in Iran. I am a US citizen and was born abroad in Iran.

Q: How can I get an apostille for my birth certificate that can be used in Mexico?

A: You must contact the U.S. Department of State Office of Vital Records in Washington, D.C. They issue you a certified birth certificate and then send it to the U.S. Department of State's Office of Authentication, to obtain the apostille for use in Mexico.