Abdul Kashem, a trustee of the Al Quba Mosque and Shahporan Islamic centre, in Manchester, condemned underage marriage.
His comments came after an ITV Exposure programme spoke to a man at the mosque claiming to be the Imam who said he would be willing to perform an Islamic marriage for a 14-year-old girl.
However Mr Kashem said the name mentioned in the report "doesn't belong to us".
He added: "It's an open office. It's a mosque. It's not something private and locked up. During the praying hours there are hundreds of people that come here. I don't know how old this guy is and it could be age differences and maybe making fun out of it."
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