One option is to only buy directly from a government owned mint that pours its own bars. e.g. http://www.perthmint.com.au/investment_bullion_bars_coins_barspage

One option is to only buy directly from a government owned mint that pours its own bars. e.g. http://www.perthmint.com.au/investment_bullion_bars_coins_barspage.aspx http://www.perthmint.com.au/investment_bullion_bars_coins_ba...