A high-profile ATSIC commissioner has denied claims that more than $500,000 is 'unaccounted for' at a south-east Queensland Aboriginal corporation he once headed.

Newspaper reports claim auditors of the Queensland South Representative Body Aboriginal Corporation had found there was 'inadequate documentation' to support more than $545,000 in cheques.

But the group's former chairman, Ray Robinson, says as far as he knows there is no missing money.

"I don't sign cheques and the thing is that as the chairman of the organisation, I had nothing to do with the administration of the organisation," he said.

"They might have paid me for travel now and then to travel to meetings and things like that but I don't sign cheques.

"I don't run the administration of the organisation."