The United States and Iran have signed a memorandum of understanding that Iranian officials say is now fully official [1].

The agreement marks a significant diplomatic shift between two nations that have maintained a hostile relationship for decades. A formal understanding between Washington and Tehran could alter regional security dynamics and economic sanctions.

Iranian foreign ministry spokesperson Ismail Baghaei said the memorandum of understanding has become fully official because both the U.S. and Iran signed it [1]. The document was signed by U.S. President Donald Trump (R-WY) and Iranian President Masoud Beshkian [1].

According to reports, the signing occurred June 18, 2026 [1]. While the Iranian foreign ministry asserts the deal is complete, other reports indicate that a final agreement has not yet been reached [1].

President Trump said he would consult with the White House operations room to make a final decision regarding the proposed understandings with Iran [1]. The specific terms of the memorandum were not detailed in the public statements issued from Tehran [1].

This development follows a period of fluctuating tensions and intermittent diplomatic signaling. The official nature of the MoU depends on the verification of the signatures by both administrations, a process the Iranian government now claims is finished [1].

“The memorandum of understanding has become fully official because both the U.S. and Iran signed it.”

The conflicting reports regarding the finality of the agreement suggest a gap between the diplomatic rhetoric in Tehran and the internal decision-making process in Washington. While Iran is signaling a completed deal to the public, the U.S. administration's internal review process may still be ongoing, indicating that the MoU's implementation could face further hurdles.