A standard visitor's visa allows someone to visit the UK for up to six months to see family and friends, attend a business trip or study.
Although Amirul, who completed his year as mayor in May, has been told to issue an unreserved apology, he has yet to do so, the report mentioned.
Councillor Georgiou Alessandro, the leader of the council's Conservative group, said: "The Enfield Labour council knew about these allegations long before he became mayor and he was still allowed to take office. This all brings deep shame upon the council. He should resign."