The endorsement ceremony was held in Tehran on Tuesday, weeks after the ex-Judiciary chief won the country’s 13th presidential election by a landslide.
Ayatollah Khamenei’s decree, endorsing the presidential mandate of Raeisi, was read out at the event by head of the leader's office.
The ceremony was held at Imam Khomeini Hosseiniyeh in Tehran in full compliance with COVID safety protocols and attended by the country’s senior state and military officials.
Raeisi, the eighth president of the Islamic Republic of Iran, won almost 62 percent of the votes in the June 18 presidential election and will succeed President Hassan Rouhani, who served two four-year terms in office.
Raeisi will take an oath of office in an inauguration ceremony at the Iranian Parliament (Majlis) on Thursday.