Guardianship and curatorship in Thailand
Written by Greg Berryman. Sources last checked 7 August 2026.
Thai law's answer to incapacity is not a document you sign in advance. It is a court process somebody else runs after the fact.
What is the difference between guardianship and curatorship?
Two tiers, depending on how much capacity has gone.
Guardianship. A person of unsound mind may be adjudged incompetent by the court and placed under guardianship. The guardian then acts for them.
Curatorship. A person with a physical or mental infirmity that leaves them unable to manage their own affairs may be declared quasi-incompetent and placed under curatorship instead. The category also covers habitual prodigality and habitual intoxication. It is the lighter of the two.
Who can apply to the court?
A spouse, an ascendant, a descendant, an existing guardian or curator, a person taking care of the individual, or the public prosecutor.
Note that this list is wider than the inheritance rules. "A person taking care of the individual" appears, on its face, to give a live-in partner standing to apply, which the inheritance provisions never do.
Standing to apply is not the same as being appointed. Whether a Thai court would appoint a long-term partner over a blood relative living abroad is unresolved, and it is with a Thai lawyer. This site will not guess at it.
How long does it take?
It is two applications and two hearings, not one. The first petition establishes that the person is incompetent and requires a guardian. The second assesses and appoints a specific person.
Reported timelines start at three months, and longer where a court is unwilling to entertain an emergency petition. Treat three months as a floor rather than an estimate.
Meanwhile the bank account is frozen and the bills keep arriving. That gap, and who ends up paying, is on if you lose capacity rather than die.
What can a guardian do once appointed?
- Make legal and medical decisions for the ward.
- Manage the ward's property and finances, and ensure bills are paid.
- Determine where the ward lives.
- Manage the ward's contact with other people.
That last power deserves attention rather than a footnote. A court-appointed guardian can control who has access to the person. For an unmarried couple where a relative abroad obtains guardianship, that is not a theoretical risk.
Can a foreigner be appointed guardian?
Yes, though restrictions and requirements may apply. The court decides on a best-interests standard rather than a fixed order of precedence, and it generally appoints close relatives: parents, siblings, grandparents.
Can you choose your own guardian in advance?
No. There is no Thai equivalent of nominating an attorney while you are well. You cannot appoint your guardian, and neither can anyone else. Only a court can, and only once you can no longer do it yourself.
What you can do is leave evidence. A written, dated and witnessed statement naming who you would want appointed and why is not binding on a court, but it is material a court applying a best-interests test can consider, and there is nothing else in the file speaking for you. What weight it carries is a question for a Thai lawyer.
Alongside that: a living will for medical refusal at the end of life, marriage where it is available and acceptable to you, and an inventory of what exists and where it is, because much of the delay in these processes is not the court. It is assembling the documents the court asks for.