Shaky phone footage showing the wedding of a 34-year-old man and an underage child was shown in a Melbourne court.

Muslim cleric Ibrahim Omerdic, 61, is fighting claims he solemnised or intended to solemnise the pair's marriage, which was not subsequently formalised under Australian law.

Police seized footage from the husband's phone, in which Omerdic, who was an imam of the Bosnian Islamic Society and Noble Park Mosque, can be heard telling the girl it was her duty to obey her husband.

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Muslim cleric Ibrahim Omerdic, 61, is fighting claims he solemnised or intended to solemnise the wedding of a 34-year-old man and an underage child

Police seized footage from the husband's phone, in which Omerdic can be heard telling the girl it was her duty to obey her husband

'If (your husband) is happy with something, do it. If (your husband) is not happy with something, don't do it,' he tells the girl.

'She's very young,' he can be heard telling the child's mother and her betrothed.

Police executed a search warrant of Omerdic's office, finding wedding materials, ceremonial garb, wedding readings and certificates.

The Certificate of Islamic Marriage also contained a disclaimer stating the document could not validate a marriage by Australian law.

Omerdic was an imam of the Bosnian Islamic Society and Noble Park Mosque (pictured)

The Victorian Board of Imams in September condemned marriages that were illegal in Australia.

'As Australian Muslims we are required to observe and respect the laws of Australia,' it said.

The Islamic Council of Victoria also condemned underage marriages, despite saying it was acceptable in some cultures.

'It is true that marriage at a younger age is permitted in other countries and cultures, but this is not a justification for marriage below the legal age or child marriages here in Australia,' it said in September.