The U.S. Treasury privately ordered Binance to tighten its oversight of cryptocurrency flows tied to Iran, warning that about $1.7 billion in transfers to Iran-linked entities during 2024 and 2025 had already slipped through. The ultimatum, delivered in recent weeks, adds fresh pressure on the exchange just as Senator Richard Blumenthal launches a formal probe into alleged sanctions violations.
A private warning from Treasury
Treasury’s move wasn’t public. Sources say the agency told Binance it must fully comply with post-2023 monitoring measures — or face consequences. Treasury Under Secretary Gene Lange made the point explicit: Binance is obligated to hand over data records and documents in a timely way as part of the independent-monitor regime already in place.
The exact date of the ultimatum hasn’t been disclosed, but it landed as investigators traced roughly $1.7 billion in crypto that moved to Iran-linked wallets over the prior two years. That figure dwarfs earlier estimates, though Treasury hasn’t confirmed whether all those transfers violated sanctions.
The $1.7 billion question
The scale of the suspected flows is the real headline. Investigations indicate Binance didn’t flag or block a significant portion of the transactions — a lapse that, if proved, would put the exchange in direct conflict with the 2023 settlement that installed the monitor. Under that deal, Binance agreed to enhanced screening for high-risk jurisdictions, including Iran.
The Treasury’s private ultimatum suggests the agency believes the exchange hasn’t gone far enough. Binance, for its part, said this week it’s fully cooperating with the monitor and relevant agencies. No details on what additional steps it’s taking.
Senator Blumenthal steps in
Blumenthal’s inquiry adds a political dimension. The senator sent a formal letter to Binance and co-CEO Richard Teng asking for documents and explanations. His office has been looking into Iran-linked crypto activity for months, but this is the first direct request to the exchange.
The timing isn’t great for Binance. The company is still rebuilding trust after the 2023 settlement and a string of executive departures. A new sanctions scandal — especially one involving Iran — could reignite calls for harsher penalties, including a potential revocation of its U.S. operating license.
What comes next
Blumenthal has given Binance a deadline to respond. The Treasury’s monitor is expected to issue a compliance report in the coming weeks. If that report finds Binance out of step with the ultimatum, the agency could escalate — possibly with fines or new restrictions. For now, the exchange says it’s cooperating. Whether that’s enough remains the open question.
