A shipping company agrees terms on a voyage charter. The vessel is flagged in one jurisdiction, managed from another, and the cargo moves through a port covered by a third. The charterer's compliance team screens the shipowner and finds no direct listing. The vessel itself is clean. But one of the corporate entities in the management chain sits in a structure with significant links to sanctioned interests – and the question of whether the shipment is prohibited turns entirely on which regime governs, and what that regime's ownership and control test actually requires.
Maritime and shipping sanctions under OFSI and the EU share a common objective – restricting access to vessels, ports, cargo, and the financial flows that support them – but they diverge materially on ownership thresholds, vessel-tracking obligations, flag-state responsibility, and the scope of prohibited services. As of January 2026, UK OFSI applies a financial-sanctions regime whose maritime provisions have expanded considerably, while the EU has built one of the most detailed ship-tracking and services-prohibition regimes in operation. Understanding where the two regimes align and where they do not is the core analytical task for any cross-border operator.
This analysis maps the key points of divergence between OFSI and the EU on maritime and shipping sanctions, sets out the tests that decide exposure, identifies the risk flags that practitioners encounter most frequently, and explains when cross-border operators should bring in specialist counsel.
What are the governing authorities and legal bases for maritime sanctions?
OFSI administers UK financial sanctions under the Sanctions and Anti-Money Laundering Act 2018 (SAMLA) and the relevant thematic sanctions regulations made under it. The maritime-services prohibitions and ship-management restrictions form part of those thematic regulations, which OFSI has expanded through successive designation rounds and licensing guidance. OFSI's enforcement guidance and its published licensing practice set the operational standards for UK-regulated operators.
On the EU side, the legal basis is the relevant Council Regulations and Council Decisions, implemented and enforced by member-state competent authorities. The EU maritime prohibitions cover a wider range of designated vessels, vessel-related services, and port-access restrictions than the basic financial-sanctions layer. The EU's oil price cap (a set of price-ceiling conditions attached to third-country trade in certain crude oil and petroleum products) adds a further services layer that intersects directly with shipping finance, insurance, and brokerage.
The United Nations Security Council Consolidated List provides the baseline multilateral framework. Both OFSI and the EU have adopted additional autonomous designations that go beyond UN positions – and in some maritime cases those autonomous measures diverge from each other, creating a dual-regime compliance obligation for any operator working across both markets.
For US-connected transactions, OFAC's SDN List and the relevant IEEPA-based sanctions programmes impose a separate layer. A vessel that clears UK and EU requirements may still engage US secondary-sanctions risk if it carries goods, operates routes, or deals with counterparties that engage the US regime. We return to that extraterritorial dimension later in this analysis.
How do the ownership and control tests apply to vessels and shipping entities?
The ownership threshold under OFSI and the EU captures entities in which designated persons hold 50 percent or more, directly or indirectly, in the aggregate. For a vessel-owning special-purpose vehicle, this test applies to the SPV itself and to any intermediate holding structures. OFSI's published guidance adopts this position and treats the analysis as running through the full ownership chain.
What the two regimes handle differently is the control limb. Under OFSI and the EU, ownership and control (the test for whether a non-listed entity is caught through a listed person) encompasses not only formal ownership but also effective direction and economic benefit. In the maritime sector, control questions arise in contexts that pure ownership screening may miss entirely.
Beneficial ownership of a vessel registered under a flag of convenience is frequently structured through layers of nominee shareholders, management companies, and crewing agencies. The formal registered owner may appear clean. The entity that directs the vessel's commercial operations and receives the economic return may not be. In our cross-border practice, the most frequent miss we see is a compliance review that stops at the first corporate layer rather than tracing who actually benefits from the freight revenue.
The EU adds a further dimension through its designated-vessel list. A vessel placed on the EU list of designated ships is itself subject to prohibitions regardless of whether its owner or manager is separately designated. Port access, pilotage, towage, flag-of-convenience services, and ship-to-ship transfers can all be prohibited on a vessel-specific basis. OFSI has moved in a similar direction but has not yet created an equivalent stand-alone vessel-designation list at the same scale. That asymmetry matters to port operators, pilots, and maritime insurers working across both regimes.
Where do the maritime-services prohibitions diverge most sharply?
The services prohibitions represent the deepest point of divergence between OFSI and the EU in the maritime context. Both regimes prohibit providing funds and economic resources to designated persons. But the EU's maritime-specific provisions extend those prohibitions to a range of transaction-support services that have a distinct significance in shipping.
Under the EU regime, the prohibition on providing brokerage, flagging, classification, insurance, reinsurance, and maintenance services to designated vessels and their operators has been articulated in considerable detail. Operators in those sectors – P&I clubs, classification societies, ship registries, freight brokers, and port agencies – face express obligations. The prohibition covers new contracts and, in many cases, the continuation of existing contracts after a designation.
OFSI's financial-sanctions prohibitions reach the same outcome through the general funds and economic resources prohibition, but the specific articulation of maritime-support services within the UK regulations is less granular than the EU equivalent. UK operators in those sectors must work from the general prohibition and OFSI's licensing practice, rather than from a sector-specific provision of the kind the EU has written into its regulations.
The practical consequence is that a P&I club, classification society, or ship manager operating across the UK and EU markets faces different compliance reference points in each jurisdiction. The EU provision may cover a transaction that the UK provision does not address expressly – or vice versa. The principle that the stricter prohibition governs is the safest working assumption, but it is not always straightforward to identify which measure is stricter when the prohibitions are structured differently.
In a recent matter, a maritime insurance operation needed to determine whether it could continue covering a vessel after one of the vessel's intermediate owners came under designation. The question engaged both OFSI and EU provisions. We assessed the ownership chain, identified the relevant prohibitions in both regimes, and advised on whether a licence application was available. The analysis required treating the two regimes as separate exercises before synthesising a combined position – precisely because the tests and the services covered did not map cleanly onto each other.
What does the oil price cap add to the OFSI and EU maritime picture?
The oil price cap is a mechanism introduced under the EU regime and mirrored under UK and US provisions, designed to condition access to Western maritime services on evidence that the oil being shipped does not exceed a defined price ceiling. It applies to third-country purchases of designated crude oil and petroleum products transported by sea, and it ties the availability of shipping, brokerage, insurance, and related services to documentation confirming price compliance.
For maritime operators – owners, charterers, brokers, insurers, and financial institutions funding voyages – the price cap imposes an affirmative documentation obligation. Service providers must obtain and retain attestations confirming that the cargo price falls within the permitted ceiling. The record-keeping requirement is operationally significant: without adequate documentation, the service provider risks having provided a prohibited service.
The divergence between OFSI and the EU on the price cap is procedural as much as substantive. The EU has issued detailed guidance on the documentation chain, the categories of attestation acceptable, and the liability position of service providers who rely on customer attestations in good faith. OFSI's equivalent guidance is less detailed, and UK operators have had to read across from EU guidance to fill gaps. That approach works in most cases but introduces uncertainty where the EU and UK positions on good-faith reliance are not identical.
A further practical issue is the secondary-sanctions dimension. OFAC operates its own price-cap regime under IEEPA. A UK or EU operator handling a voyage that might engage the US price cap must consider whether the documentation standards applied satisfy the US regime – not merely the UK or EU one. We regularly advise on precisely this three-way analysis, and the answer is rarely that one documentation package serves all three authorities.
How does OFAC's extraterritorial reach affect OFSI and EU maritime compliance?
US secondary-sanctions risk is a practical constraint on maritime operators even where the transaction has no formal US nexus. OFAC has designated vessels, shipping companies, and flag-state entities under IEEPA-based programmes. A non-US vessel transporting non-US goods between non-US ports can still engage US secondary-sanctions risk if it calls at a US-jurisdictional port, transacts in US dollars, uses US-domiciled financial institutions, or employs US-incorporated service providers in the chain.
For a UK or EU operator structuring a maritime transaction, the question is therefore not only whether OFSI and the EU prohibit the transaction. The question is also whether US secondary-sanctions exposure attaches to any party in the chain, and whether US touchpoints in the financing or settlement of the transaction bring the deal within OFAC's reach.
The OFAC SDN List (the list of Specially Designated Nationals and blocked persons) and the 50 percent rule (OFAC's rule treating entities owned 50 percent or more by blocked persons as themselves blocked) apply on a US-law basis independently of whatever OFSI or the EU say. A vessel that is clean under OFSI and the EU may be owned through a structure that crosses the OFAC threshold, or may be managed by an entity on OFAC's Non-SDN Menu-Based Sanctions list, creating secondary risk for US-nexus parties in the chain.
Cross-regime screening is therefore not optional for maritime operators of any significant scale. In our experience, the firms that face enforcement inquiries are not generally those that knowingly accepted risk. They are the ones whose screening was anchored in one regime and did not consider the others.
The position above sets out the standard analytical structure. Your facts – the vessel's flag, the ownership chain, the cargo, the financial institutions in the settlement chain, and the jurisdictions of the service providers – determine which elements of the analysis are critical for your transaction. For an assessment of correspondent-banking and financial-institution exposure in cross-border shipping transactions, contact our team.
What are the risk flags that maritime operators most commonly miss?
Experience in cross-border maritime compliance work reveals a consistent pattern of missed risk. The flags below are the ones that appear most frequently.
Vessel-name and IMO-number mismatches. Designated vessels are frequently renamed or re-flagged after designation in an attempt to continue operations. Screening against vessel name alone without verifying the IMO number – the unique identifier that stays with a vessel throughout its life – produces false negatives. The IMO number should be the primary identifier in any vessel-screening process.
Ownership changes post-signing. A vessel or counterparty that was clean when the charter was agreed may come under designation after signing but before the voyage. Contracts that do not address this scenario leave the operator without a clear procedure when the position changes mid-performance. Sanctions event clauses – provisions that allow termination or suspension where a designation makes performance prohibited – are standard in well-drafted maritime contracts but are still absent from many in-house templates.
Ship-to-ship transfers. STS operations in international waters are a known mechanism by which cargo changes hands in ways that obscure its origin. Both the EU and OFSI have provisions addressing STS transfers in certain circumstances, but the practical enforcement of those provisions requires operators to maintain records of where their vessel has been and who it has transacted with – including in waters not covered by port-state controls.
Flag-state designation. Some flag registries or their administering entities have come under designation or close scrutiny. A vessel flagged in such a registry may carry operational risk beyond the formal prohibition question. Operators should review the flag-state position as part of the overall counterparty assessment, not treat flagging as a separate matter.
Insurance-chain exposure. Hull and machinery cover, P&I insurance, and war-risk cover all involve service providers that are themselves subject to the prohibitions. If the insurer or the reinsurer is prohibited from covering the vessel or cargo, the insurance is void or the insurer faces a compliance issue – which in turn affects the operator's financing and port-state access. Checking the insurance chain is part of the maritime due-diligence exercise, not a separate task.
How do OFSI and the EU handle licensing for maritime transactions?
Both OFSI and the EU provide licensing routes – formal authorisations to conduct an otherwise prohibited transaction – that can apply to maritime activities. The procedural approach and the scope of available grounds differ in ways that matter for operators seeking a practical route forward.
OFSI issues specific licences (case-by-case authorisations to conduct an otherwise prohibited transaction) and may issue general licences (standing authorisations permitting a defined category of transactions without a separate application). In the maritime context, OFSI has issued general licences covering certain wind-down and legacy-contract transactions, as well as licences addressing humanitarian and safety-of-life situations. The grounds available for a specific licence application are defined in the relevant thematic regulations, and not all grounds apply in all programmes.
The EU licensing regime operates through member-state competent authorities. There is no single EU licence. A maritime operator needing authorisation across multiple member states must, in principle, apply to the relevant competent authority in each state where the prohibited activity would occur. In practice, the lead-jurisdiction approach applies in some cases, but this is not universally available and depends on the structure of the relevant Council Regulation.
A business that has already commenced a maritime operation and then encounters a designation mid-performance faces a narrower licensing window than one that identifies the issue before the contract is signed. Acting early – before a transaction is in progress – preserves the full range of licensing and structuring options. If a transaction has already been flagged or a filing refused, an early review by specialist counsel can preserve options that close progressively as time passes.
If a maritime transaction has been flagged, a vessel has come under designation, or an insurer or port authority has raised a compliance concern, contact Calder & Vance at info@caldervance.com for a confidential review.
The myth that vessel-screening alone satisfies maritime sanctions obligations
A common misconception among maritime operators – including some with established compliance functions – is that screening the vessel against the major lists satisfies the maritime sanctions obligation. It does not. The vessel-screening exercise is one input into a wider analysis that must cover the ownership chain behind the vessel, the management and crewing entities in the operational chain, the cargo origin and destination, the financial institutions handling freight payments, the insurance providers, and the ports of call.
Each of those elements can independently engage a prohibition under OFSI, the EU, or OFAC. A vessel that is not itself designated may be owned by an entity caught by the ownership and control test, managed by a prohibited party, carrying cargo subject to a separate goods-specific prohibition, financed through a bank that faces secondary-sanctions exposure, and insured by a P&I club that cannot lawfully provide cover.
The obligation on a UK-regulated operator under OFSI, or on an EU-regulated operator, is not to screen a single identifier and move on. It is to take reasonable steps to satisfy itself that the full transaction does not breach the applicable prohibitions. What counts as reasonable steps is a function of the risk profile of the transaction – and for maritime operations, the risk profile is almost always higher than it appears at first review.
We regularly advise compliance teams that have run a vessel-name check and concluded the transaction is clear. The challenge, consistently, is that the clearing analysis ran only to the registered owner and did not follow the economic interests behind that structure. The ownership and control test requires following the beneficial interest to its end.
Related practices
- Correspondent banking and de-risking (OFAC) – financial-institution exposure in cross-border shipping and trade-finance chains
- Payment and escrow structuring: BIS EAR vs EU – export-control considerations for structured trade-finance transactions
- Payment and escrow structuring: OFAC vs BIS EAR – US sanctions and export-control dimensions in trade payment structures