According to CoinMeta, the Swiss subsidiary of the Polish state-owned company Orlen, OTS, encountered failure in its crude oil procurement from Venezuela. It prepaid approximately $230 million to a Dubai trader, Hannon, with plans to purchase 6 million barrels of crude oil, but ultimately only received about 500,000 barrels of fuel oil. In the financial chain, US dollars were converted into USDT by intermediaries, but there were disputes over the payment destination between Hannon, Horizon, and the supplier PDVSA. This incident highlights that in a scenario where sanctions, offshore intermediaries, stablecoin settlements, and commodity trading are intertwined, ensuring contract fulfillment and recovering funds becomes more complex.