US Senator Again Writes to DOJ and FinCEN, Inquiring About Progress on Binance Iran Transaction Monitoring

BroadChain learned that at 17:16 on April 18, according to Bitcoinist, U.S. Democratic Senator Richard Blumenthal is intensifying scrutiny of cryptocurrency exchange Binance due to new questions raised about its handling of transactions related to Iran. On April 17, Blumenthal sent two new letters to the U.S. Department of Justice and the Financial Crimes Enforcement Network of the Treasury Department, focusing on inquiring about the specific work progress and supervision effectiveness of the two compliance monitors stationed at Binance in 2024, in order to assess whether Binance has genuinely strengthened its anti-money laundering system. Previous reports from multiple media outlets claimed that Binance dismissed internal investigators who had warned executives that over $1 billion in funds flowed through the platform to wallets linked to Iran. Blumenthal had previously requested Binance to provide a specific timeline of accounts involved in Iranian transactions and an explanation for delays in law enforcement responses; it remains undisclosed whether the documents were received before the April 14 deadline. In a statement on February 22, Binance denied violating sanctions laws and disclosed that its sanctions-related risk exposure as a proportion of total trading volume decreased from 0.284% in January 2024 to 0.009% in July 2025, a reduction of 96.8%; trading volume involving four major Iranian exchanges dropped from $4.19 million in January 2024 to $1.1 million in January 2026. As of press time, BNB is trading at $638, with 24-hour and seven-day gains of 4% and 6%, respectively.