This comes from a recent Numismaster article titled "Avoid problems with precious metals IRAs."
"When the depository received the cases, the staff there did a cursory check that the case was sealed with a U.S. Mint seal and that the weight was correct for the contents to be 500 coins. When the coins were later sold, it turned out that the depository had received counterfeit cases. The U.S. Mint seal was counterfeit and some of the cases did not contain any coins, just scrap metal."
https://fakebullion.com/index.php/news- ... ra-account