Mokbel associate on Qld fraud charges

A man linked to Melbourne underworld figure Tony Mokbel has faced court in Queensland on fraud charges.

Jack Doumani, 53, made a brief appearance at Southport Magistrates Court alongside his son John, 22, on several fraud charges after a police investigation into a "boiler room" cold call investment scam on the Gold Coast.

Police allege the father and son co-ordinated an unregulated business offering non-existent investment opportunities.

During raids at properties across the Gold Coast in October, police seized two luxury vehicles and a jet ski as well as several computers and office equipment.

Jack Doumani is a school friend of convicted drug kingpin Mokbel and allegedly operated a betting business for him on the Gold Coast.

The pair are just two of several people facing charges for similar fraud offences following a crackdown on similar scams.

Another unrelated group, dubbed the "Irish Boys", are accused of fleecing more than $4 million from hundreds of victims in an 18-month period.

The Doumanis will return to court on February 2.