The mint started "doping" its gold as a cost-saving measure When it got caught for some of its gold dipping below Shanghai Gold Exchange standards, it kept it quiet.
Last year alone it sold $20.3 billion in gold.
But in recent years the 124-year-old institution, officially known as Gold Corporation, has been plagued by a series of scandals.
WA Premier Mark McGowan had ministerial responsibility for the mint for four years until March 2021.
Perth Mint has been a pillar of Western Australia's gold industry for more than 120 years.
This would then need to be transported back to Perth and recast before it could be sold again.
"Potentially you'll get gold buyers in the market going, 'Can we trust anything coming out of the Perth Mint? »