Tether Under Scrutiny as Senator Links Stablecoin to Terrorist Financing
The world’s leading stablecoin, Tether (USDT), is once again facing intense scrutiny from Congress, with allegations now extending to its ties with Wall Street firms. A report released on September 28, 2026, by Democratic Senator Richard Blumenthal claims that Tether’s USDT has become a significant payment channel for Iran-linked networks and sanctioned entities associated with terrorist proxies. The report also questions Tether’s relationship with Cantor Fitzgerald, a firm that holds an equity stake in Tether and manages a substantial portion of its U.S. reserves.
“Tethered to Terrorism” Report Highlights USDT’s Role
Titled “Tethered to Terrorism,” the report details findings from a review of 846 cryptocurrency wallets designated by the U.S. Treasury’s Office of Foreign Assets Control (OFAC) and Israel’s National Bureau for Counter Terror Financing. The analysis, covering the period from June 2021 to August 2026, revealed that 84% of these flagged wallets heavily utilized USDT, making it the predominant digital asset transacted through these addresses.
The report further breaks down the usage by designation list. Among wallets flagged by Israeli authorities, USDT was used in 87% of cases, while for OFAC-designated wallets, the figure stood at 57%. The report specifically identifies two sanctioned Iranian oil smugglers who allegedly moved over $603 million in USDT through networks connected to Hezbollah and Houthi factions.
Concerns Over Potential Self-Dealing with Cantor Fitzgerald
Cantor Fitzgerald’s involvement with Tether includes a 5% equity stake and the management of a significant portion of Tether’s U.S. reserves, estimated to be over $100 billion. Senator Blumenthal’s report raises concerns about potential self-dealing arising from these connections. The core worry, as outlined in the report, is that a firm with both an ownership interest and a custodial role in Tether’s reserves may lack the necessary neutrality when overseeing the stablecoin’s usage.
Calls for Investigations into Sanctions Compliance and AML Practices
To address these concerns, Senator Blumenthal has formally requested that Treasury Secretary Scott Bessent and Attorney General Todd Blanche initiate inquiries into Tether’s operations. The focus of these potential investigations would be on the company’s adherence to sanctions regulations and its anti-money laundering (AML) practices.
Tether has stated its commitment to cooperating with law enforcement agencies. The company claims to have assisted in freezing approximately $550 million in Iran-affiliated USDT during 2026. Unlike decentralized cryptocurrencies such as Bitcoin, USDT is issued by a central entity, Tether, which possesses the ability to freeze tokens at specific addresses. Tether highlights this capability as evidence of its collaboration with authorities.
Enforcement Gaps and Investor Caution
While the freezing of $550 million is noted as significant, critics point out that the two alleged smugglers alone are reported to have moved over $603 million in USDT. This discrepancy could be interpreted as a sign that Tether’s enforcement tools are more reactive than preventive.
For traders and investors, the immediate question is whether these senatorial requests will translate into formal regulatory action. A senator’s letter does not constitute an indictment, and neither the Treasury Department nor the Department of Justice has announced any investigations in response.
The report suggests that investors may adopt a more cautious approach, particularly those with substantial exposure to USDT. Heightened scrutiny could potentially impact USDT’s liquidity and its adoption among institutional investors.
Broader Implications for Stablecoin Regulation
The involvement of Cantor Fitzgerald introduces an additional layer of risk. If concerns about self-dealing gain traction, the investigation could broaden to encompass how Tether’s reserves are managed, not solely how its tokens are utilized.
According to the research, should probes uncover systemic issues within Tether’s operations, regulators might impose stricter operational rules across the entire stablecoin sector. This could lead to significant changes in how dollar-pegged tokens handle wallet screening, transaction freezes, and reporting requirements.
Key Developments to Watch
Several key developments will be closely monitored in the coming weeks. These include public responses from Secretary Bessent’s Treasury Department and Attorney General Blanche’s Justice Department to Senator Blumenthal’s requests. Additionally, attention will be paid to whether Tether expands its token-freezing activities or provides more detailed information on its sanctions screening processes. Finally, the public’s response from Cantor Fitzgerald regarding its dual role as a shareholder and reserve manager will be significant.
