Secret audio tapes reveal ongoing conflict inside Transport Workers Union

An investigation into the Queensland Transport Workers Union has revealed failure to disclose conflicts of interest in awarded union contracts and that it had multiple bank accounts with sloppy and slack management procedures.

The discovery comes as audiotapes obtained by 9News have revealed the continuing turmoil inside the union after allegations of financial mismanagement earlier this year.

The investigation, headed by retired Justice Frank Marks, found the union had 10 different bank accounts and that members money was spent on a "redundancy" payment that should not have happened.

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"It's very unusual to have 10 accounts over four different banks or different banking institutions," Mr Marks can be heard saying on tapes obtained by 9News.

"As far as anybody knows, no money is missing, but the fact is it creates an environment where money could go missing."

The investigation also raised concerns over a reported six-figure redundancy payment given to former assistant secretary Adam Carter after former branch Secretary Peter Biagini approved it.

"I have called in my report this is a contrived situation. So, it's been dressed up to look like it's a redundancy; I don't think it is a redundancy," Mr Marks said.

"There is some suggestion, by the way, in any event, that Adam Carter was paid more money than he was due, and that also will require some further investigation."

The Transport Workers Union says it's waiting on legal advice to see if it might recover the money paid to Adam Carter.

Mr Carter maintains he was simply paid out his lawful entitlements.