Transferring wealth across generations, and across legal systems that do not agree with one another.
A will drafted competently in one jurisdiction can revoke or conflict with one drafted equally competently in another. Neither drafter was wrong. Neither knew about the other.
Several civil law systems reserve portions of an estate to specified heirs regardless of the will. Planning built on an assumption of free disposition can fail entirely where such a system applies.
Where an operating business passes to several heirs without a governance arrangement, the practical outcome is frequently a sale, at a time and price nobody chose.
Which law governs each asset and each person, and where those systems conflict with one another.
Forced heirship or comparable reserved-share rules, and any matrimonial property regime that determines what is available to dispose of in the first place.
A structure that reduces fragmentation and avoidable tax on succession, built around the constraints rather than in denial of them.
Coordination of wills and related documents across jurisdictions so they operate together, plus governance for anything that will be held jointly afterwards.
“I have a will, so it is handled.”
A will drafted in one jurisdiction can conflict with or revoke one drafted in another, and neither drafter was necessarily told about the other. Coordination is the substance of the work.
“I can leave my estate to whoever I choose.”
Not everywhere. Several civil law systems reserve portions to specified heirs regardless of the will, and where assets or people connect to such a system, planning has to be built around that.
“We will work it out as a family when the time comes.”
That arrangement is tested precisely when cooperation has broken down. Decision rules set while everyone can still discuss them calmly are worth more than any efficiency elsewhere in the plan.
Succession planning across jurisdictions fails most often through contradiction rather than through tax. A will drafted competently in one country revokes or conflicts with an instrument drafted equally competently in another. Neither drafter was wrong. Neither was told about the other.
The substantive constraint that surprises people is that testamentary freedom is not universal. Several civil law systems, including those in this region's legal tradition, reserve portions of an estate to specified heirs regardless of what the will says. Where assets or people are connected to such a system, the planning has to be built around that constraint rather than around an assumption of free disposition.
The most durable arrangements are the ones that anticipate disagreement. Structures that work only while the family continues to cooperate tend to be tested precisely when cooperation has broken down. Building the decision-making rules explicitly, in advance, while everyone is still able to discuss them calmly, is worth more than any tax efficiency achieved elsewhere in the plan.
Matrimonial property regime is the constraint most often missed, and it operates before succession law is even reached. In several civil law systems the regime that applied at marriage determines what each spouse actually owns, which in turn determines what is available to be left to anyone. A plan built on an assumption about ownership that the regime contradicts does not merely produce a suboptimal outcome. It can be substantially unenforceable, and this is discovered at the worst possible moment.
The governance dimension is separate from the tax and usually more consequential to the family. Where a business or an indivisible asset passes to more than one person, the arrangement needs decision rules: who directs it, how disagreement is resolved, and on what terms someone can exit. Establishing those rules while the person whose estate it is can still participate, and while relationships are intact, is worth considerably more than any efficiency achieved elsewhere in the plan.
Every Private Client engagement opens the same way: a fixed fee review of your current position, delivered as a written memorandum with risks and opportunities ranked and a recommended path. No open ended discovery.