Secondary Sanctions Explained for Non-US Companies (2026)

A Swiss commodities trader executed a €4.2 million oil transaction with a Middle Eastern counterparty in March 2025, settling entirely in euros through Frankfurt correspondent banks. Six months later, OFAC designated the trader's parent company as a Specially Designated National—not for touching US dollars, but for engaging in "significant transactions" with an entity added to the Iran sanctions programme. Within 48 hours, the firm lost access to dollar clearing. Eighteen million dollars in pending settlements were stranded.

Secondary sanctions allow the United States Office of Foreign Assets Control (OFAC) to restrict non-US companies from accessing the US financial system if they deal with sanctioned targets. The transaction never touched US soil, involved US persons, or used US dollars. Yet the penalty applied anyway.

Unlike primary sanctions that bind American entities directly, secondary sanctions impose consequences extraterritorially. A third-country firm can lose correspondent banking access, face export licence denial, or be designated as a Specially Designated National (SDN) for activities conducted entirely outside US jurisdiction. The leverage is real: you need dollars to do global business. Control the dollar system, and you control who plays.

Secondary sanctions are enforcement mechanisms that penalise non-US persons for engaging with sanctioned countries, entities, or sectors by restricting their access to US financial infrastructure, US markets, or dollar-denominated services—applied regardless of whether the prohibited activity has any US nexus (OFAC Sanctions Programs and Country Information, 2025).

Specially Designated National (SDN) is an individual or entity listed by OFAC whose assets are blocked, with whom US persons are generally prohibited from dealing, and whose designation triggers the "50 percent rule" that automatically applies blocking measures to entities they own or control (31 CFR § 560.211).

Key Takeaways

• Secondary sanctions apply to non-US companies with no US connection if they conduct significant transactions with entities on OFAC's SDN list or in prohibited sectors.
• Russia, Iran, North Korea, Syria, and Venezuela programmes carry the broadest secondary sanctions authorities targeting foreign firms.
• OFAC can freeze US correspondent accounts, deny export licences, or add violators to the SDN list without judicial process or criminal conviction.
• US dollar clearing creates sanctions exposure. Most dollar transactions route through US correspondent banks subject to OFAC jurisdiction—which is why the Swiss trader's account closed in 48 hours, not weeks.
• The "significant transaction" threshold evaluated case-by-case: dollar value, frequency, commercial significance, the party's awareness of sanctions risk. No bright-line rule exists, which is the problem.

What Are Secondary Sanctions and How Do They Differ from Primary Sanctions?

Primary sanctions bind US persons—citizens, residents, entities organised under US law, anyone physically in the United States. They prohibit direct engagement with sanctioned countries or listed individuals. A US company cannot export goods to Iran. A US bank cannot process payments for a designated Russian defence entity. A US citizen abroad remains subject to these prohibitions regardless of location. The jurisdictional hook is simple: nationality, incorporation, or presence on US soil.

Secondary sanctions extend consequences to people who have none of those connections. A German logistics firm ships Venezuelan crude. OFAC blocks that firm's access to US correspondent banks. A Chinese technology supplier sells dual-use equipment to a sanctioned Russian military-industrial enterprise. OFAC designates the supplier as an SDN, freezing any US-sited assets and prohibiting all US persons from dealing with it. The transaction itself never touched the United States, never used dollars, never involved American parties. The penalty was still loss of future access to US markets and the US financial system.

OFAC uses a menu of secondary sanctions, tailored by programme and conduct. Denial of US export licences is the least severe—it restricts the violator's ability to purchase American technology or controlled goods. More serious is correspondent banking prohibition under Section 104(c) of the Comprehensive Iran Sanctions, Accountability, and Divestment Act (CISADA), which directs US banks to close or severely limit correspondent accounts for foreign financial institutions that facilitate significant transactions for sanctioned Iranian entities. Most severe is SDN designation under authorities such as Executive Order 13662 (Russia) or Executive Order 13224 (terrorism). Designation freezes all US-sited assets, prohibits US persons from transacting with the designee, and triggers the "50 percent rule"—automatically designating any entity the SDN owns 50 percent or more of, directly or indirectly.

Practical differences between primary and secondary sanctions

A French aerospace manufacturer sells avionics to a Russian state defence conglomerate on the SDN list. France does not sanction Russia. The sale occurs entirely within Europe. Yet OFAC can invoke Executive Order 14024 (signed February 2022, expanded through 2024–2025) to designate the French firm as an SDN for "materially assisting" a blocked person. Alternatively, the US Department of Commerce Bureau of Industry and Security can add the firm to its Entity List, cutting off access to US semiconductors and aerospace components the firm needs for other product lines.

What happens next? The firm's US subsidiary is immediately prohibited from remitting dividends or conducting intercompany transactions. The parent company cannot source parts. The designation cascades—any firm majority-owned by the French company is also blocked. This is secondary sanctions in action: extraterritorial leverage applied through access dependencies. The actual sanctioned transaction happened in Europe, thousands of miles from US jurisdiction, yet the consequences are total.

Which Sanctions Programmes Apply Secondary Sanctions to Non-US Companies?

Five sanctions programmes carry broad secondary sanctions authorities targeting non-US persons: Russia, Iran, North Korea, Syria, and Venezuela. Each programme permits OFAC to penalise third-country actors who deal with designated persons, prohibited sectors, or sanctioned government entities.

Russia: Executive Order 14024 (as amended through 2025) authorises blocking sanctions against non-US persons determined to operate in Russia's defence and related materiel, aerospace, marine, and electronics sectors, or to have materially assisted, sponsored, or provided financial, material, or technological support to any blocked person. Directive 2 under E.O. 14024 prohibits correspondent banking for foreign financial institutions that conduct significant transactions involving Russia's military-industrial base. Since February 2022, OFAC has designated over 1,200 non-US entities under these authorities, including firms in China, Turkey, United Arab Emirates, and Central Asia. If you supply Russia's defence sector, you are exposed—regardless of where you are incorporated.

Iran: The Iran Sanctions Act (ISA) and CISADA authorise secondary sanctions for significant transactions in Iran's energy sector (petroleum, petrochemicals, natural gas), transactions with Iranian financial institutions on the SDN list, and provision of goods or services that materially contribute to Iran's ability to acquire or develop weapons of mass destruction or support terrorism. OFAC can impose up to six penalties from a menu including correspondent banking restrictions, denial of US Export-Import Bank financing, prohibition on US government procurement, and SDN designation.

North Korea: Executive Order 13810 (September 2017) authorises blocking of non-US persons determined to have engaged in at least one significant transaction in connection with North Korea's transportation, mining, energy, or financial services industries, or to have facilitated a significant transaction on behalf of any blocked North Korean person. OFAC has used this authority to designate shipping companies in multiple jurisdictions for transporting North Korean coal and facilitating ship-to-ship transfers to evade UN sanctions.

Syria: The Caesar Syria Civilian Protection Act (enacted December 2019, 22 U.S.C. § 8791) imposes mandatory secondary sanctions on non-US persons who provide significant financial, material, or technological support to the Government of Syria or conduct significant transactions with Syrian military or intelligence services. Penalties include blocking of property, visa restrictions for corporate officers, denial of US export licences, and restrictions on US financial institution loans exceeding $10 million in any 12-month period.

Venezuela: Executive Order 13850 (November 2018) and subsequent orders authorise blocking sanctions against non-US persons operating in Venezuela's gold sector or any other sector of the Venezuelan economy as may be determined by the Secretary of the Treasury. OFAC has designated non-US mining firms, logistics companies, and financial facilitators under this authority.

What activities trigger secondary sanctions under these programmes?

The common denominator across programmes is the "significant transaction" with a sanctioned target. OFAC evaluates significance using size, frequency, nature, and context. A single $50 million oil purchase from a sanctioned Iranian entity will almost certainly qualify. A dozen smaller transactions totalling $10 million over six months may also meet the threshold.

OFAC examines the transaction's commercial significance to the sanctioned party—did it provide critical revenue, technology, or access? The inquiry also focuses on the actor's awareness of sanctions risk. Did the actor conduct due diligence? Receive warnings? Structure the transaction to evade detection? That last question is dangerous: if OFAC believes you knew and tried to hide the transaction, designation becomes likely.

Sectoral exposure varies by programme. For Russia, involvement in defence, aerospace, or marine sectors triggers heightened scrutiny. For Iran, petroleum exports, refined products, and petrochemical trade remain primary targets. For North Korea, coal, textiles, seafood, and metals—all subject to UN Security Council prohibitions—are red flags. For Syria, construction, engineering, and energy sectors associated with reconstruction efforts can trigger Caesar Act sanctions. For Venezuela, gold mining and crude oil exports are the principal targets.

Financial services supporting sanctioned entities create secondary sanctions risk regardless of sector. Providing correspondent banking, trade finance, letters of credit, or foreign exchange services that facilitate a sanctioned party's access to the international financial system can result in correspondent banking restrictions or SDN designation. European, Middle Eastern, and Asian banks have faced these penalties for processing payments, clearing transactions, or maintaining accounts for SDN-listed entities or their shell companies. This is where the Swiss trader's bank made its mistake—it cleared euros through Frankfurt, but the transaction's destination was sanctioned, and Frankfurt correspondent banks answer to OFAC.

Technology transfers to sanctioned defence industries are drawing intense scrutiny. Export semiconductors, machine tools, avionics, or dual-use goods to Russia's military-industrial base or Iran's missile programme, and non-US suppliers face designation under E.O. 14024 or the Iran Sanctions Act. The US Department of Commerce Bureau of Industry and Security works in lockstep with OFAC to map technology supply chains feeding sanctioned actors—and they're getting better at spotting obscured relationships.

How Does the US Nexus and Correspondent Banking Create Exposure?

Most non-US companies cling to a comforting myth: if you avoid US persons, US dollars, and US soil, you're safe. You aren't. Secondary sanctions reach conduct with zero direct US nexus by leveraging one simple fact—the US financial system is the beating heart of global commerce, and nearly every international bank depends on it to survive.

Correspondent banking as the enforcement lever: Picture how international payments actually move. A German bank needs to send dollars to a Chinese counterparty. It doesn't have direct access to Federal Reserve accounts, so it routes the payment through a correspondent account at JPMorgan Chase, Citibank, or Bank of America. That intermediary US bank clears the dollars, takes a small fee, and processes the transaction. For most international banks across Europe, Asia, the Middle East, and Latin America, these correspondent relationships aren't optional—they're survival infrastructure. Without them, a bank cannot offer dollar services, which means it cannot compete in global trade finance.

When OFAC prohibits correspondent banking under CISADA Section 104(c) or imposes a "correspondent banking restriction" as a secondary sanction, it orders all US financial institutions to shut down or severely restrict the violator's correspondent accounts. The foreign bank loses its ability to clear dollar transactions, access dollar repo markets, and serve customers needing dollar liquidity. For a commercial bank, this is existential. International trade is priced and settled in dollars. Lose that access, and you're sidelined.

Why US dollar use creates secondary sanctions exposure: The dollar dominates international trade settlement—roughly 40 percent of SWIFT payment messages worldwide involve dollars—and anchors global reserves at about 58 percent of central bank holdings. Even transactions between non-US parties in third countries often settle in dollars. Oil trades in dollars. Container shipping invoices in dollars. Commodity hedges price in dollars. When your transaction touches dollars, it touches the US financial system somewhere in the chain: either directly (both payer and payee banks have US correspondents) or indirectly (an intermediary's correspondent account). That touch creates jurisdiction.

OFAC screens every dollar transaction that clears through US banks. Correspondent banks deploy automated screening tools that run party names, addresses, vessel identifiers, and account numbers against the SDN list, sectoral sanctions identifications, and other restricted party databases. A hit triggers a block. The bank files a report with OFAC. Repeat violations—multiple blocked transactions from the same originating foreign bank—invite correspondent banking restrictions or outright designation of that bank.

How SWIFT messages and nostro accounts amplify exposure

The Society for Worldwide Interbank Financial Telecommunication (SWIFT) network carries payment instructions between banks globally. A single customer payment via SWIFT MT103 message might pass through four or five intermediary banks, each holding correspondent (nostro/vostro) accounts at the next link. If any link touches a US bank or a US-located account, OFAC jurisdiction attaches. US correspondent banks monitor SWIFT traffic for sanctions compliance, creating checkpoints even when goods and services never leave foreign territory.

OFAC has specifically sanctioned foreign banks and payment processors for obscuring transaction details—stripping sanctioned party names from SWIFT messages, routing payments through cover accounts, removing location identifiers—to evade screening. European banks learned this the hard way: settlements with OFAC exceeding $1 billion for Iran and Sudan transactions during the 2010s. SDN designations followed for the institutions themselves.

What Does It Mean to Be Designated as a Specially Designated National (SDN)?

OFAC maintains the SDN list: a registry of individuals, entities, vessels, and aircraft whose property and financial interests are frozen under US sanctions programmes. As of January 2026, over 12,000 entries populate it. Designation requires no criminal charge, no court proceeding, no conviction. OFAC makes a determination, publishes your name, and enforcement begins immediately.

Consequences of SDN designation for non-US companies: Once designated, every asset you own in the United States is blocked. Every dollar held in a US bank account is frozen. US persons cannot do business with you—no payments, no transfers, no exports, no imports, no legal advice, no accounting services, nothing. The prohibition is absolute even for otherwise lawful transactions.

For non-US companies, designation carries a hidden cost beyond direct asset freezes. Any entity that is 50 percent or more owned by one or more SDNs (directly or indirectly, individually or in the aggregate) becomes automatically blocked—even if OFAC never names it on the SDN list. This is the "50 percent rule" under 31 CFR § 510.329. Your US subsidiary freezes. Your 60-percent-owned Chinese joint venture freezes. Even a minority stake in a Dubai logistics firm may freeze if your ownership plus another SDN's stake exceeds 50 percent. You didn't trigger the cascade—the rule did.

Non-US persons face a different threat: secondary sanctions. You're free under US law to deal with SDNs, but doing so invites designation of yourself as an SDN. Materially assist a sanctioned entity, and OFAC can add your name to the list under the same or related authority. The effect cascades. European Bank A gets designated for financing Iranian oil exports. Asian Bank B continues correspondent banking with Bank A. OFAC designates Bank B for materially assisting an SDN. Banks worldwide sever ties with Bank B to avoid designation themselves. One misstep multiplies across continents.

How non-US companies end up on the SDN list

OFAC designates non-US persons as SDNs under several statutory and executive order authorities. Corporate designations typically follow one of these pathways:

Material support or assistance: Provide financial, material, or technological support to a sanctioned person, programme, or government. Supply chain services count—logistics, shipping, brokerage, freight forwarding. Financial intermediation counts—banking, currency exchange, trade finance. Provision of goods or technology counts—dual-use equipment, luxury goods, petroleum services. The support doesn't need to be direct. OFAC has designated shell companies, front entities, and intermediaries several layers removed from the ultimate sanctioned party.

Significant transactions: Engage in one or more significant transactions with an SDN or in a prohibited sector. OFAC weighs the size, number, and frequency of transactions; their economic and strategic importance to the sanctioned party; and your level of awareness. A $100 million oil lifting from a sanctioned Iranian terminal counts. A pattern of smaller shipments may also cross the threshold.

Ownership or control: Be owned or controlled by an SDN. The 50 percent rule triggers automatically. OFAC sometimes names subsidiaries explicitly to increase enforcement visibility.

Operating in designated sectors: Russia's defence and energy sectors, Venezuela's gold sector—for programmes with sectoral sanctions, simply operating in a designated sector can trigger designation if OFAC determines you're embedded in that sector and connected to sanctioned governments or blocked parties.

Evading or attempting to evade sanctions: Structure transactions to circumvent sanctions, obscure beneficial ownership, use shell companies, falsify documents, or relabel goods to hide origin or destination. OFAC has designated shipping companies for repainting vessel names, falsifying automatic identification system (AIS) data, and transferring cargo at sea to avoid detection.

The designation process and lack of prior notice

OFAC designations happen without warning. OFAC collects intelligence from US government agencies, banks' suspicious activity reports, open-source research, and foreign governments. Once OFAC concludes a person meets the criteria for designation, it packages the case and seeks approval from senior Treasury officials. The Secretary of the Treasury signs off. OFAC publishes the designation early morning US Eastern Time.

No hearing precedes it. No chance to respond. You learn about your designation when a correspondent bank calls to say transactions are blocked, or a commercial partner emails to terminate the contract. Hours later, your name appears on sanctions screening lists used by banks, insurers, shipping lines, and trade finance providers worldwide. The international financial system locks you out.

What Compliance Steps Should Non-US Companies Take to Avoid Secondary Sanctions?

Non-US companies face a paradox: they aren't bound by US law, yet they can face commercial catastrophe for violating US sanctions rules. Anyone engaged in international trade, operating in sanctioned jurisdictions, or maintaining supply chains in higher-risk sectors must build compliance programmes specifically designed to address secondary sanctions exposure. The stakes are real—designation can trigger automatic loss of dollar access, frozen assets, and effective expulsion from global finance.

Implement comprehensive SDN screening: Before onboarding any counterparty—customers, suppliers, joint venture partners, agents, distributors—screen them against the SDN list. Then do it again. Monthly or quarterly rescreening depending on risk level catches designations that happened after the initial check. Screening must reach beyond the front entity: beneficial owners, controlling shareholders, senior management all need to be vetted. Automated screening tools compare names, addresses, dates of birth, identification numbers, and vessel IMO numbers against the SDN list and restricted party lists (Entity List, Denied Persons List, Sectoral Sanctions Identifications List). A positive match doesn't mean you stop—you investigate. Common names generate false positives. Transliteration variations from Arabic, Cyrillic, or Chinese create matching noise. Distinguishing signal from noise takes work.

The "50 percent rule" complicates screening: if a counterparty is 50 percent or more owned by an SDN, transactions with that counterparty violate blocking prohibitions even if the SDN isn't a direct party to the deal. That ownership stake can hide in corporate registries, shareholder disclosures, and beneficial ownership databases—or it can hide nowhere if the company operates through shell structures in low-transparency jurisdictions, relies on bearer shares, or uses nominee directors. Opaque ownership structures dramatically increase compliance risk because you cannot verify what you cannot see.

Conduct enhanced due diligence on sanctioned jurisdictions and sectors: Russia's defence and aerospace sectors, Iran's petroleum industry, North Korea's commodities exports, Syria's reconstruction projects, Venezuela's gold and oil operations—transactions involving these trigger heightened scrutiny. Enhanced due diligence means going beyond a database check. You obtain detailed information on the counterparty's business activities, revenue sources, government connections, and any prior sanctions-related issues. Site visits. Third-party verification. Ongoing monitoring. High-value or high-frequency relationships warrant all three.

Establish policies to identify and avoid significant transactions: OFAC publishes no dollar threshold that automatically qualifies as "significant," so companies adopt internal thresholds—amounts below which they simply won't engage with higher-risk counterparties. Evaluate transaction size, frequency, commercial significance to the sanctioned party, and strategic importance to your own business. Legal counsel should review high-risk transactions before execution. The goal is to prevent drift: small deals compound into patterns that OFAC sees as material support.

Monitor general licenses, FAQs, and guidance updates for carve-outs: OFAC periodically issues general licences authorising transactions otherwise prohibited—wind-down periods for divesting from blocked persons, humanitarian exemptions, energy infrastructure safety transactions. OFAC publishes FAQs clarifying how sanctions apply to specific scenarios. Compliance teams must monitor OFAC's website because these updates can open lawful pathways for transactions that would otherwise be blocked. Missing an update means losing a legal opportunity or taking on unnecessary risk.

Alternative payment rails and non-dollar settlement: Where commercially feasible, structure transactions to avoid US dollar clearing. Settlement in euros, sterling, renminbi, or other currencies through banks with no US correspondent relationships shrinks OFAC's jurisdictional foothold. Still, this isn't foolproof. Secondary sanctions authorities like E.O. 14024 for Russia don't require dollar denomination or US correspondent banking; OFAC can designate based on transaction subject matter alone. Non-dollar settlement reduces—but doesn't eliminate—exposure.

Third-party certifications and contractual representations: Require counterparties to certify they are not SDNs, do not transact with SDNs, and are not engaged in activities violating US sanctions. Breach of these representations gives you grounds for contract termination and limits your liability if the counterparty is later designated. Independent verification—corporate registry checks, screening reports from sanctions screening vendors—strengthens your due diligence file if OFAC ever questions your approach.

What is a significant transaction under secondary sanctions rules?

OFAC applies a non-exhaustive list of factors to evaluate whether a transaction is "significant" and thus exposes the actor to secondary sanctions:

• Size and frequency: Dollar value matters—measured individually or cumulatively over time. But "material" is relative. A $10 million transaction dwarfs a small company's annual revenue but disappears in a multinational's quarterly figures. OFAC compares transaction size to both the actor's business scale and the sanctioned party's needs.

• Nature of the transaction: Supplying military equipment, dual-use technology, or luxury goods to a sanctioned party triggers heavier weight than routine commercial goods. Providing essential services—financial intermediation, logistics, insurance—to a sanctioned party is treated more seriously than selling commodity products.

• Commercial significance to the sanctioned party: Does the transaction generate substantial revenue for the sanctioned party, keep operations running, or unlock otherwise unavailable resources? Transactions materially supporting a sanctioned government or SDN entity are more likely to be deemed significant.

• Awareness and intent: Did you know or should you have known the counterparty was sanctioned? OFAC examines your due diligence efforts, prior warnings, public information (SDN list publication), and whether you actively tried to conceal the transaction. Wilful blindness counts as knowledge.

• Context and policy considerations: OFAC weighs the transaction's impact on US foreign policy and national security. Deals that undermine sanctions on weapons proliferation, terrorism financing, or authoritarian regime revenue receive closer scrutiny.

No published dollar threshold exists. OFAC has designated entities for transactions as low as $5 million involving North Korea coal smuggling, yet declined to designate entities involved in far larger deals when mitigating circumstances existed. The absence of a bright line forces conservative risk assessment. You cannot assume small deals are safe.

Can non-US companies seek licences or exemptions from OFAC?

Licensing authority under US sanctions generally applies to US persons seeking authorisation to engage in otherwise prohibited transactions. Non-US persons—not directly bound by US sanctions—cannot apply for OFAC licences in the traditional sense. But limited exceptions and alternative pathways exist:

General licences applicable to non-US persons: Some general licences under secondary sanctions programmes apply broadly to transaction categories without individual application. General License 8 under the Iran Sanctions Act authorises certain non-US persons to conduct transactions for agricultural commodities, food, medicine, and medical devices destined for Iran. General License 4A under E.O. 14024 authorises wind-down transactions for certain blocked persons. Non-US companies can rely on these if conditions are met.

Humanitarian exemptions: OFAC regulations often exempt or authorise humanitarian transactions—food, medicine, medical devices—even to sanctioned countries or blocked counterparties. Non-US companies in humanitarian supply chains can structure transactions within these exemptions. Documentation proving humanitarian intent (end-use certifications, NGO involvement, health ministry approvals) becomes critical.

Statements of Licensing Policy (SOLPs): OFAC publishes SOLPs indicating where it will favourably consider specific licence applications. These target US persons, but signal OFAC's willingness to grant exceptions. Non-US persons indirectly benefit when US persons obtain licences permitting transactions involving non-US counterparties.

Engagement through legal counsel: Non-US persons cannot apply for licences directly, but can engage US legal counsel to submit correspondence to OFAC requesting guidance on specific scenarios or arguing that a proposed transaction falls below the "significant transaction" threshold. OFAC occasionally provides no-action comfort letters or informal guidance, though neither is binding and both remain discretionary.

Risk mitigation through transaction structure: When licensing is unavailable, restructure to eliminate dollar clearing, avoid US persons or US-sited goods, and confirm counterparties are not SDNs or majority-owned by SDNs. Independent verification, escrow through non-US financial institutions, and phased payment tied to deliverables reduce exposure.

What Are the Real-World Consequences Non-US Companies Have Faced?

Secondary sanctions enforcement inflicts severe financial and operational consequences. Public cases show how wide the damage reaches and what mechanisms OFAC uses to impose penalties.

Chinese financial institutions and North Korea: In 2017, OFAC designated a Chinese bank under Section 311 of the USA PATRIOT Act as a primary money laundering concern and prohibited US financial institutions from opening correspondent accounts for it. The bank had processed hundreds of millions of dollars in transactions for North Korean entities involved in weapons proliferation. Loss of dollar clearing triggered immediate liquidity crisis and forced international operations to wind down. Other Chinese banks conducting North Korea-related transactions took the message and divested from North Korean clients to avoid designation.

European energy companies and Russia: When Nord Stream 1 and Nord Stream 2 exploded in September 2022, OFAC didn't just condemn the sabotage—it weaponized energy infrastructure itself. Under E.O. 14024, sanctions expanded to trap any European firm invested in Russian pipelines or LNG terminals. Several major energy companies received formal warnings and had to divest immediately or face designation. A Swiss commodities trader learned this the hard way: designated in December 2023 for moving Russian oil past the G7 price cap, his $120 million in US receivables and hedging contracts froze overnight. Counterparties in Europe and Asia terminated contracts rather than risk their own exposure. One designation doesn't just punish the target—it quarantines them from the global market.

Middle Eastern traders and Iran: In February 2024, OFAC went after a UAE trader, his shell companies across two continents, and seven cargo vessels in a single sweep. The charge: moving 80 million barrels of Iranian crude since 2021, funneling hundreds of millions to the IRGC-Qods Force. What happened next matters. International ports blacklisted the vessels. Correspondent banks worldwide froze accounts. Insurers and suppliers vanished. The trader faced travel bans and total asset lockdown. This wasn't just one company's problem—it showed OFAC's playbook: designate the trader, designate the vessels, designate the shell companies, then watch global supply chains self-enforce by cutting ties.

Chinese technology suppliers and Russia: October 2024 brought designations against three Chinese electronics makers for shipping semiconductors and drone parts to Russian defence contractors. OFAC used "materially assisting" language under E.O. 14024—broad enough to catch suppliers three steps removed from the battlefield. The companies lost access to US chips and equipment they needed for their own production. They challenged the designations in US courts and lost. Within six months, European and Japanese suppliers stopped selling to them anyway, terrified of US market access being revoked. Secondary sanctions often don't require OFAC to lift a finger after the initial designation.

Financial penalties and reputational damage: Designation destroys far more than frozen accounts. Credit ratings crater. Insurance premiums spike. Counterparties demand letters of credit, advance payment, security deposits—costs that bleed a company dry even before assets are seized. A 2025 sanctions consulting analysis found that non-US firms designated as SDNs lose roughly 40 percent of enterprise value within twelve months. That's direct asset loss plus contract terminations plus soaring cost of capital compounding together. Banking, shipping, commodities, and tech companies suffer worst because their survival depends on dollar-denominated trade and unrestricted supply chains. Block either one, and the company suffocates.

This article is published by an independent law firm for informational purposes only and does not represent or claim affiliation with any government body, international organisation, or official authority.

Frequently Asked Questions About Secondary Sanctions for Non-US Companies

Do secondary sanctions apply if my company never touches the United States?

Yes—this is the shock most foreign companies face. OFAC doesn't care whether you have US operations, US shareholders, or dollar accounts. Secondary sanctions reach across oceans based purely on what you trade and with whom. Deal with an SDN entity or operate inside Russia's defence sector? OFAC can cut off your US correspondent banking, block your export licences, or designate your entire company—regardless of whether you've ever set foot in America. A company operating only in Europe or Asia can wake up frozen from the US financial system overnight.

How does OFAC enforce secondary sanctions against foreign companies?

Two mechanisms. First: financial strangulation. OFAC threatens to ban US banks from maintaining correspondent accounts for any foreign bank that clears transactions for sanctioned entities. No correspondent account means no dollar clearing—and most global trade runs on dollars. Second: SDN designation. OFAC names a foreign company as a Specially Designated National, freezing any US assets and banning all US persons from dealing with it. That triggers the cascade. Other foreign firms know that touching the newly designated SDN risks their own sanctions exposure, so they sever ties automatically. One designation becomes a thousand.

What industries face the highest secondary sanctions risk?

Banks and financial institutions sit at the top because they intermediate every transaction and every clearing. Oil and gas traders move the volume. Shipping and logistics companies carry the cargo. Mining firms extract gold, coal, and metals that feed sanctioned buyers. Defence and aerospace manufacturers build the hardware. Technology companies supply semiconductors and dual-use components. If your business touches Russia, Iran, North Korea, Venezuela, or Syria, you need a compliance programme that treats every transaction like a minefield.

Can a company be removed from the SDN list, and how?

Delisting is possible but gruelling. You petition OFAC with proof that the conduct has stopped, compliance controls are locked in, and continued designation no longer serves US foreign policy. OFAC publishes delisting guidance on its website. Realistically, you'll need US legal counsel, detailed factual submissions, corporate governance overhauls, and likely independent audits. OFAC has no statutory deadline—expect six months to years of waiting. Even then, OFAC might say yes with strings attached: ongoing compliance audits, transaction reporting, or business restrictions that never fully expire. A delisting petition is hope more than certainty.

Are there any safe harbors or exemptions for non-US companies?

Limited ones. General licences carved out by OFAC cover food, medicine, and medical devices for civilian populations in sanctioned countries—even Iran or North Korea. Some licences authorise wind-down periods for divesting blocked interests or finishing pre-existing contracts. Beyond that? Nothing broad. Each safe harbour is narrowly tailored to one programme, one transaction type. Check OFAC's website for the specific general licences tied to your industry and target country, then work with counsel to confirm you qualify. Assume no exemption exists until you've read the regulatory text yourself.