Almost a dozen Brisbane souvenir shops are set to be investigated following an Office of Fair Trading operation targeting fake indigenous art.

Spot-checks conducted in February and March this year resulted in 11 stores across Brisbane and the Sunshine Coast requiring further investigation following questions on the fidelity of their Indigenous art.

The crackdown comes after The Arts Law Centre of Australia estimated 80 percent of Indigenous art is fake in souvenir shops, with the imitation industry worth $200 million a year.