The Ocean Is Not a Wall.

On 23 June 2026, the two most consequential financial-sanctions regulators in the English-speaking world published a document that quietly dismantles that instinct. The United States’ Office of Foreign Assets Control (OFAC) and the United Kingdom’s Office of Financial Sanctions Implementation (OFSI) issued a joint publication titled The U.S. and UK Economic Sanctions Authorities: A Comparative Overview, released alongside their annual Enhanced Partnership Exchange (OFSI, Achieving our objectives; Supporting our stakeholders: OFAC-OFSI Enhanced Partnership Exchange 2026, 23 June 2026; U.S. Department of the Treasury, featured story). It is, on its face, a modest technical guide — a side-by-side of two sanctions systems, their lists and licences and reporting deadlines. Read with a planner’s eye, it is something larger. It is two sovereign enforcement machines telling the private sector, in a single voice, that they now compare notes, share files, and think about the same problem together — and that the Atlantic between them is administrative, not protective.

The Volkov Law Blog put the point crisply: the Atlantic still separates Washington from London, but “increasingly, it no longer separates sanctions enforcement” (Michael Volkov, OFAC and OFSI Send a Clear Message: The Atlantic Ocean Is No Longer an Enforcement Barrier, Corruption, Crime & Compliance / Volkov Law Blog, July 2026). That sentence is about sanctions. But the principle it states is the one this series returns to again and again, in every corner of the offshore world: distance is not a defence. A cooperating jurisdiction will cooperate. The lesson generalises far beyond sanctions law, and clients who hold wealth across borders should read it carefully.

It is worth being precise about the document, because the precision is the point.

The OFAC–OFSI Enhanced Partnership was announced in October 2022 — a formal commitment by the U.S. Treasury and HM Treasury to deepen coordination on financial sanctions (OFSI, Enhanced Partnership Exchange 2026). It is not a press-release friendship. It rests on an OFAC–OFSI Memorandum of Understanding that facilitates regular information-sharing, joint industry engagement throughout the year, and an annual in-person strategic exchange (describing engagement and information-sharing facilitated through the OFAC–OFSI Memorandum of Understanding, joint industry engagements, and coordination on matters including shadow-fleet disruption, Syria sanctions, and counternarcotics regimes). The June 2026 Comparative Overview is the most substantive public product of that partnership to date: a joint explanation, from both agencies at once, of how their two regimes line up on sanctions lists, licensing, recordkeeping, reporting, jurisdiction, and enforcement (OFSI, Enhanced Partnership Exchange 2026; see also Morgan, Lewis & Bockius LLP, OFAC and OFSI Issue Joint Comparative Overview of US and UK Sanctions Regimes, July 2026).

The overview is candid about where the two systems differ — and those differences are instructive, because each reflects a distinct theory of reach:

• Jurisdiction. U.S. sanctions extend broadly, including through secondary sanctions and other restrictions that bite on non-U.S. persons; UK sanctions rely more conventionally on territorial and nationality-based jurisdiction (Baker McKenzie, OFAC and OFSI Publish Joint Guidance Comparing US and UK Sanctions Regimes, Global Sanctions & Export Controls Blog, 2026, noting U.S. sanctions have “significant extraterritorial effects, including through secondary sanctions,” whereas UK sanctions “generally rely on territorial and nationality-based jurisdiction”). The American regime is designed to follow the dollar and the U.S. nexus wherever it travels.
• Ownership and control. OFAC applies its 50 Percent Rule — an entity is treated as blocked where one or more blocked persons own, in aggregate, 50% or more of it. OFSI applies a different ownership analysis supplemented by a separate control test, capable of catching an entity even where the ownership threshold is not met, where a designated person can ensure the entity’s affairs are conducted in accordance with his wishes (Morgan Lewis, July 2026, noting the UK approach applies where a designated person owns over 50% of shares or voting rights or can, through indirect control, “ensure the affairs of the entity are conducted in accordance with the person’s wishes”; Baker McKenzie, 2026).
• Fault. Both regimes now impose civil monetary penalties on a strict-liability basis. OFAC has long done so. The United Kingdom moved to strict liability for financial-sanctions penalties on 15 June 2022: OFSI no longer needs to prove that the breaching party knew, or had reasonable cause to suspect, that it was in breach (HM Treasury / OFSI, Financial sanctions enforcement and monetary penalties guidance; Baker McKenzie, 2026). Ignorance mitigates; it does not exonerate.

The regulators’ own bottom line, echoed by every firm that has analysed the document, is that compliance with one regime does not guarantee compliance with the other — the two must be assessed separately, jurisdiction by jurisdiction (Morgan Lewis, July 2026, “compliance with one sanctions regime will not necessarily satisfy the requirements of the other”; Baker McKenzie, 2026, companies subject to both regimes should “ensure that their compliance programs address the specific requirements of each jurisdiction”). That caution, aimed at multinational compliance officers, happens to be the same caution every cross-border wealth plan requires.

Strip away the sanctions specifics and a plainer message remains. When two regulators publish jointly, they are not merely educating industry. They are advertising a capability. They are saying: we talk to each other; we share what we find; and the fact that your conduct touches two countries is a reason for you to worry, not to relax.

This is the exact inversion of the folk theory of offshore. The folk theory holds that spreading assets and conduct across jurisdictions multiplies the barriers a pursuer must cross — two legal systems, two languages, two sets of lawyers, two oceans of delay. Sometimes, against a lazy or under-resourced adversary, that is true. But against a determined one operating inside a cooperation framework, the arithmetic reverses. Multiple jurisdictions become multiple fronts, each capable of feeding the others information, each capable of enforcing at home what was decided abroad. The OFAC–OFSI partnership is the sanctions-world instance of a machinery that now exists almost everywhere money moves.

We have watched the same machinery operate in adjacent fields and written about each:

• In beneficial-ownership transparency, the Cayman Islands, the British Virgin Islands, and the wider offshore world have joined a global architecture of registers and automatic information exchange, so that ownership hidden in one place is increasingly visible from another. Secrecy, we argued, is not protection; a structure that works only while undiscovered is not protected but merely concealed.
• In judgment enforcement, we saw the Bahamian courts sit squarely inside the common-law tradition of recognising and enforcing foreign money judgments on a low threshold — a US or UK creditor “does not need to win their case twice.”
• And in Chishti, we watched a Bermuda court recognise a New York arbitral award, appoint receivers in aid of execution, and order a debtor’s offshore-held shares sold — reaching, in the express words of its own rules, property held “in his own name or by another person in trust for him or on his behalf.”

The sanctions story rhymes with all three. A cooperating jurisdiction will enforce. The friction that clients imagine protects them is, increasingly, being engineered away by treaties, memoranda of understanding, mutual-recognition regimes, and partnerships exactly like OFAC–OFSI.

Here the anxious client draws the wrong conclusion, and it is worth heading off. He hears “distance is no defence” and concludes that offshore planning is dead — that if regulators cooperate and courts enforce and registers talk to one another, there is no point in crossing an ocean at all.

That is precisely backwards. The convergence of enforcement does not abolish the difference between good planning and bad. It sharpens it. It simply removes one thing from the menu — the illegitimate thing — and leaves the legitimate architecture entirely intact.

Consider what cross-border cooperation actually defeats. It defeats concealment: the asset that was safe only because the pursuer could not find it. It defeats evasion: the conduct structured across borders precisely to slip between two enforcement systems. It defeats improvisation: the hurried move offshore after a claim or an inquiry has appeared. These are the strategies of a man treating a jurisdiction as a hiding place — and they are exactly the strategies that a cooperation framework is built to catch. Two regulators sharing a file, or two courts honouring one another’s judgments, are lethal to the client who was relying on the gap between them.

What cross-border cooperation does not defeat is legitimate structure resting on legal substance rather than on distance. The protections this series describes have never depended on a creditor’s inability to reach the jurisdiction:

• Seasoning. A properly built structure is settled and funded years before any claim is foreseeable — at a time when there is nothing to hinder, delay, or defraud, and therefore no wrongful intent to infer. Seasoning is a fact about time, not about geography. No amount of regulatory cooperation reaches back to manufacture intent that was never there.
• Irrevocability and discretion. The settlor genuinely surrenders control; the benefit is discretionary, not guaranteed. There is no switch for a court — foreign or domestic — to order him to flip.
• Independent administration. A real, independent trustee holds and decides. This is the line between a trust and a sham, and it holds whether the trustee sits in Nevis or in Nassau.
• A remedy-limiting situs. Where assets sit behind a robust charging-order regime or in a non-recognition jurisdiction, a creditor who locates the structure — who knows exactly what it is and who benefits — still cannot take the corpus. He is limited to a charge against distributions that may never come.

Notice what is absent from that list, again: secrecy, distance, and the hope that no one is watching. A structure built on the four elements above works exactly as well in a world of cooperating regulators as in a world of isolated ones — because it never asked the ocean to do the work in the first place.

The two columns are not two flavours of the same thing. They are opposites. One treats a jurisdiction as a wall to hide behind; the other treats it as a legal environment whose substantive law — its charging-order remedy, its non-recognition rule, its trust statute — does the protecting in full daylight. Enforcement convergence punishes the first column and leaves the second untouched.

The practical lessons are few and firm.

Assume cooperation, not friction. Build every cross-border plan on the premise that the relevant authorities and courts talk to one another and will enforce for one another. If a structure only survives on the assumption that they will not, it is already a bad structure. The OFAC–OFSI Comparative Overview is one data point in a long, one-directional trend; plan for its destination, not its starting point.

Comply with each regime on its own terms. The regulators’ own headline — that satisfying one system does not satisfy the other — is sound planning doctrine well beyond sanctions. A structure legitimate in its situs must also be correct where the client is resident, where the assets are administered, and where reporting is owed. Cross-border cooperation means each of those jurisdictions can now see, and act on, the others’ facts.

Value substance over distance. Choose a jurisdiction for what its law does — the strength of its charging-order remedy, the integrity of its trust regime, the professionalism of its fiduciaries — not for how far away it is or how hard it is to reach. Distance is a depreciating asset. Substance is not.

Never improvise across a border. Moving wealth offshore in response to a live or foreseeable claim, or restructuring to slip between two enforcement systems, is precisely the conduct that cooperation frameworks are designed to catch and that fraudulent-transfer law is designed to unwind. It manufactures evidence, not protection.

The OFAC–OFSI Comparative Overview will be read, correctly, as a sanctions-compliance document. But its deeper message belongs to everyone who holds wealth across borders. Two of the world’s most serious regulators stood on opposite shores of the Atlantic and published, in one voice, a map of how their systems fit together. The map is an announcement: the water between us is not a barrier to us, and it should not be a comfort to you.

For the client who was using an ocean as a hiding place, that is unwelcome news, and it should be. For the client who built on law — seasoned, irrevocable, independently administered, sitting behind a remedy the local statute simply will not extend to a creditor — it changes nothing at all. He was never relying on the distance. He was relying on the design. And design, unlike distance, does not shrink when two regulators shake hands.

The time to build that kind of structure is what it has always been: early, openly, and on a clear day — long before any ocean is asked to do work that only the law can do.