Separate asset scopes
The Thai will covers Thai assets and foreign wills cover theirs, so each court can proceed independently.
People with assets in several countries often make separate wills per country, each limited to its assets with a targeted revocation clause. Spouses' mirror wills are separate individual wills, not a joint will.

People with assets in several countries often make separate wills per country, each limited to its assets with a targeted revocation clause. Spouses' mirror wills are separate individual wills, not a joint will.
This page explains multi-jurisdiction wills and spouses' mirror wills. General information under the Thai Civil and Commercial Code; not legal advice on your situation.
The Thai will covers Thai assets and foreign wills cover theirs, so each court can proceed independently.
Do not use a blanket "revoke all prior wills" clause without excepting the other will, or it may be revoked.
Each spouse makes their own will with similar terms; each may revoke or change theirs alone.
Name executors who can actually act in each country and how they coordinate.
State who takes if a beneficiary dies first or simultaneously, especially in mirror wills leaving assets to each other.
When changing one will, review the others so beneficiaries, shares and executors stay consistent.




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