Manhattan US Attorney Probes Binance Over Iran Sanctions
The Manhattan US Attorney's Office is investigating whether Binance knowingly permitted trading that breached US sanctions on Iran, according to a report by Bloomberg published on 22 September 2026. The DOJ's Criminal Division in Washington is also involved, making this a two-front federal inquiry with serious implications for any accounting firm, auditor, or CFO advising clients who transact on the exchange.
What the Investigation Covers
The Bloomberg report, citing people familiar with the matter, describes a probe that is examining whether Binance allowed Iran-linked trading while knowing it contravened US sanctions law. That framing matters: "knowingly" is the operative word, because it speaks directly to the standard of criminal intent prosecutors would need to establish.
How this escalates the March reporting
The Wall Street Journal first revealed in March 2026 that the DOJ was examining whether Iran used Binance to evade sanctions, drawing on company documents and individuals with knowledge of the situation. At that stage, it was unclear whether the government's lens was on Binance as an institution, its users, or both. The September Bloomberg report adds a critical new detail: the Manhattan US Attorney's Office is now a named participant, alongside the Criminal Division in Washington. Two distinct federal offices working a case simultaneously signals coordination and seriousness that goes well beyond a preliminary inquiry.
Binance's public position
A Binance spokesperson told Cointelegraph that the company maintains a zero-tolerance policy for sanctions violations, cooperates fully with law enforcement, and is committed to removing bad actors from its platform. That statement is carefully worded and confirms neither the scope of the investigation nor any specific remedial steps taken internally.
The Sanctions Framework at Stake
US sanctions on Iran are administered primarily by the Office of Foreign Assets Control (OFAC) under the Treasury Department. Comprehensive sanctions prohibit virtually all transactions involving Iranian counterparties, regardless of where those transactions are routed or what currency, including cryptocurrency, is used. The relevant statutory framework includes the International Emergency Economic Powers Act (IEEPA) and the Iran Transactions and Sanctions Regulations (ITSR). Violations can give rise to both civil penalties from OFAC and criminal prosecution under IEEPA, which carries substantial fines and, for individuals, potential custodial sentences.
Why a crypto exchange faces particular exposure
A centralised exchange that onboards users globally, processes large transaction volumes, and holds custody of assets sits squarely within the definition of a financial institution for sanctions purposes. OFAC's 2021 guidance on sanctions compliance for the virtual currency industry made clear that exchanges must implement risk-based controls, screen customers against sanctions lists, and apply geographic blocking where required. If prosecutors can show that Binance had information suggesting Iranian-nexus activity and did not act on it, the "knowingly" threshold becomes easier to argue.
This is also not the first time Binance has faced US enforcement attention. The exchange entered a guilty plea and a $4.3 billion settlement with US authorities in 2023, covering anti-money-laundering and Bank Secrecy Act violations. That prior action sets a documented baseline against which any new compliance failures would be measured, and it materially affects how prosecutors, judges, and counterparties evaluate the current probe.
Accounting and Audit Implications for Firms
For accounting firms and auditors, a live federal criminal investigation targeting a major exchange triggers several immediate professional obligations and risk-management considerations.
Client exposure assessment
Any client that holds assets on Binance, executes trades through the platform, or receives payments originating from Binance wallets is now attached, however indirectly, to an exchange under active criminal scrutiny. Firms should map this exposure promptly. The relevant questions are: what is the volume of Binance-sourced transactions in the client's ledger, what documentation exists to support the legitimacy of those transactions, and has the client's own sanctions-screening process been applied at the point of receipt?
Crypto bookkeeping software and digital asset accounting software used by the firm should be capable of tagging transactions by originating exchange and preserving a timestamped audit trail. If the software in use cannot do this, the gap is a material deficiency in the firm's own quality-control framework, not just a client problem.
Financial statement considerations
Where a client entity holds Binance exchange balances as assets on its balance sheet, the investigation introduces a disclosure question. Under US GAAP, contingent liabilities and concentrations of risk require disclosure when they are reasonably possible and material. An exchange under a criminal probe for sanctions violations is a concentration risk that auditors should flag. If the client is a reporting entity, the adequacy of existing disclosures should be reviewed in light of this development.
For clients using Binance as a treasury counterparty or settlement rail, there is also the question of going-concern indicators. While the investigation does not, by itself, mean Binance will face asset freezes or operational restrictions, precedent from the 2023 settlement shows how quickly regulatory action can affect an exchange's ability to serve institutional clients. Auditors should consider whether a client's reliance on a single exchange warrants disclosure or a going-concern qualifier.
AML and sanctions screening for advisory firms
Accounting firms that receive fees denominated in cryptocurrency, or that handle digital asset transactions on behalf of clients, are themselves subject to Bank Secrecy Act obligations in certain circumstances. A firm that processes or advises on transactions with a Binance nexus without adequate screening could, in an extreme scenario, face its own regulatory exposure. Reviewing the firm's own AML policy to confirm that exchange-specific risk factors are addressed is a reasonable precaution at this stage.
What CFOs at Digital Asset Businesses Should Do Now
CFOs and treasurers at companies that use Binance for any operational purpose, whether trading, custody, settlement, or payment, face a more immediate operational question: does continued use of the platform during an active criminal investigation create reputational or counterparty risk that the board needs to be informed about?
Immediate steps worth considering
First, pull a complete record of all Binance-related transactions for the past 24 months. Identify any transactions that involved counterparties in high-risk or sanctioned jurisdictions, even if the immediate counterparty was Binance itself. Second, confirm that the company's own OFAC screening programme covers not just direct counterparties but also the originating source of funds received. Third, brief the board or audit committee. A known criminal investigation involving a key financial counterparty is board-level information, regardless of whether the company believes it has any direct exposure. Fourth, engage legal counsel to assess whether any voluntary disclosure obligations arise, particularly if internal review surfaces transactions that were not previously screened adequately.
Firms that have already invested in robust crypto accounting software with built-in sanctions-flagging and jurisdiction-tracking will find this review considerably more manageable. Those relying on manual ledger entries or general-purpose bookkeeping tools face a longer and riskier reconciliation process.
The Broader Enforcement Pattern
This investigation does not exist in isolation. US enforcement activity targeting crypto exchanges for sanctions and AML failures has been consistent and escalating. OFAC has sanctioned multiple virtual currency exchanges for Iran-related activity in recent years, a pattern examined in detail in our coverage of Iran sanctions and crypto exchange enforcement: the BitBank case. The DOJ's Criminal Division has pursued parallel criminal tracks alongside OFAC civil actions in several of those matters.
The involvement of the Manhattan US Attorney's Office is also a signal worth reading carefully. That office has historically taken the lead on complex financial crime prosecutions, including crypto-related cases, and its participation suggests prosecutors believe the facts may support criminal charges, not merely a civil settlement.
Separately, the regulatory architecture around digital asset compliance continues to evolve rapidly, as discussed in our analysis of how US oversight of digital assets is evolving. Firms that treat compliance as a static checklist rather than a living programme are increasingly out of step with where enforcement is heading.
Frequently Asked Questions
Does this investigation mean Binance has been charged with a crime?
No. An investigation is not a charge, an indictment, or a conviction. The Manhattan US Attorney's Office and the DOJ Criminal Division are examining the facts. No charges have been publicly filed as of the date of this report. Firms should monitor developments but avoid treating the probe as a confirmed finding.
What are OFAC's sanctions on Iran and do they apply to crypto?
Yes, fully. OFAC's comprehensive sanctions on Iran cover all transactions involving Iranian parties regardless of the asset class or currency used. OFAC's 2021 virtual currency sanctions guidance explicitly confirmed that digital asset transactions are subject to the same rules as traditional financial transactions. Routing a payment through a crypto exchange does not exempt it from sanctions law.
Should our firm cease using Binance immediately because of this probe?
That is a risk-management and legal decision, not an accounting one. No regulator has issued a directive requiring firms to close Binance accounts. However, firms should conduct a documented risk assessment, consult legal counsel, and ensure that any continued use is supported by adequate transaction monitoring and recordkeeping. The decision should be made deliberately and recorded.
How does the 2023 Binance settlement affect how we assess this new probe?
The 2023 settlement, which included a guilty plea and a $4.3 billion resolution of AML and BSA violations, is relevant context. It establishes that Binance has previously admitted to compliance failures in a related area. Prosecutors and regulators routinely consider prior conduct when assessing the seriousness of new allegations, and counterparties and auditors should weigh the prior settlement when evaluating ongoing exposure.
What documentation should firms retain in relation to Binance transactions?
At a minimum, firms should retain trade confirmations, wallet addresses, transaction IDs, timestamps, the identity of the initiating party, and any sanctions-screening records applied at the time of the transaction. If crypto accounting software was used to classify or record the transaction, export and preserve those records in a format that can be produced in response to a regulatory or legal request.
Source: Cointelegraph