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Guardianship Extension for Adults
Extend guardianship past age 20 for incapacitated wards under Section 28 of the Civil and Commercial Code.
Quick Answer
When a guardianship ward with mental or physical incapacity approaches age 20, the guardian must file a Section 28 CCC curator petition to be re-appointed as adult guardian. We prepare the medical panel evidence, court filings, and asset-management plan — from THB 55,000, typically 2–4 months. File 90 days early to avoid a legal-capacity gap.
Categories of adult guardianship
- Incompetent person (คนไร้ความสามารถ) — Section 28, full curator
- Quasi-incompetent (คนเสมือนไร้ความสามารถ) — Section 32, partial curator with limited powers
- Post-accident cognitive impairment, dementia, autism-spectrum severe cases, coma
FAQ
- When must guardianship be extended?
- A minor's guardianship ends automatically at age 20 (majority). If the ward is incapacitated (mental incapacity, coma, severe disability) and turning 20, the guardian must petition the Family Court under Section 28 CCC to be re-appointed as curator/adult guardian before the birthday, otherwise the ward becomes legally sui juris and assets are frozen.
- What documents are needed?
- Medical certificate from a licensed psychiatrist or specialist confirming incapacity, current guardianship order, ward's ID/passport, updated asset inventory, and a proposed care/financial plan. All non-Thai documents require certified translation.
- Timeline?
- Petition to order: 2–4 months. File 90 days before the ward turns 20 to avoid an asset-freeze gap. Court will typically order a medical panel review before final ruling.
- Cost?
- THB 55,000 – 95,000 for full representation, plus medical panel and translation costs (~THB 6,000–12,000).
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Official sources
The information on this page follows the official sources below. Always check the latest version before you file.
- กรมการกงสุล — บริการรับรองเอกสาร (นิติกรณ์)— กระทรวงการต่างประเทศ
- สำนักงานตรวจคนเข้าเมือง — วีซ่า รายงานตัว 90 วัน TM.30— Immigration Bureau
- กรมการปกครอง — ทะเบียนราษฎร ทะเบียนครอบครัว— Department of Provincial Administration
- สภาทนายความในพระบรมราชูปถัมภ์ — ทนายความผู้ทำคำรับรองลายมือชื่อและเอกสาร— Lawyers Council of Thailand
- สำนักงานคณะกรรมการกฤษฎีกา — ฐานข้อมูลกฎหมายไทย— Office of the Council of State
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Guardianship in Thai law, and why the visa follows the status
Thai law separates two ideas that English often merges. Parental power (อำนาจปกครอง) belongs to parents under the Civil and Commercial Code. Guardianship (ผู้ปกครอง) is appointed by the court when a minor has no parent exercising parental power. A third status, curatorship or อนุบาล, applies to an adult declared incompetent. Immigration treats each differently, so the first task in a guardianship extension file is naming the status correctly.
A foreigner who wants permission to stay in Thailand in order to care for a minor must show a legal relationship the Immigration Act recognises, not merely a caring one. Where the applicant is not a parent, a court order appointing guardianship is the document that converts a factual arrangement into a filed basis for stay.
Court appointment: what the petition must establish
- That the minor has no parent exercising parental power, or that parental power has been terminated or suspended by the court.
- That the proposed guardian is not disqualified — bankruptcy, incompetence and certain conflicts of interest are statutory bars.
- That the appointment serves the welfare of the minor, evidenced by school records, housing, and the guardian's means.
- The minor's own view where the child is old enough to express one; the court routinely asks.
- The scope of powers requested, including whether the guardian may deal with the minor's property, which the court can limit.
Evidence Immigration expects at extension
| Item | Why it is required | Frequent defect |
|---|---|---|
| Certified court order | Establishes the legal basis for stay | Uncertified photocopy, or an order lacking the finality endorsement |
| Minor's birth certificate | Proves the minor's status and nationality | Foreign certificate without MFA-certified Thai translation |
| School enrolment letter | Shows the care relationship is ongoing | Letter addressed to nobody, or from an unaccredited institution |
| House registration or lease | Shows a stable residence with the minor | Address that does not match the Immigration office of filing |
| Financial evidence | Shows the guardian can support the minor | Funds deposited immediately before filing rather than seasoned |
| TM.30 residence notification | Statutory obligation of the housemaster | Not filed after the last re-entry, which surfaces at the counter |
Guardian's continuing duties under the CCC
Appointment is not the end of the court's involvement. A guardian who manages the minor's property must inventory it and account for it, and certain dispositions of the minor's property require the court's prior permission. Selling land belonging to a minor without that permission is void as against the minor and is one of the more damaging errors we are asked to unwind years later.
The guardianship terminates when the minor reaches majority, on the guardian's death or removal, or by court order. Because Immigration's permission to stay is derived from the status, the end of the guardianship ends the basis for extension. Families should plan the transition — study visa, work-based category, or departure — in the extension cycle before termination, not after it.
Common mistakes and how we avoid them
More questions we are asked
- Can a foreigner be appointed guardian of a Thai minor?
- Nationality is not a statutory bar. The court decides on welfare grounds and will examine residence stability, means and the relationship to the child.
- Does guardianship permit employment?
- No. Work in Thailand requires a work permit regardless of immigration category.
- What if a parent later reappears?
- A parent may petition to have parental power restored. The court decides on the minor's welfare, and the guardianship — and any derived stay — can end.
- Is a foreign guardianship order recognised automatically?
- No. It is evidence in a Thai proceeding, not a self-executing order, and it must be legalised and translated before it can be filed.
Frequently asked questions
- How does a foreigner register a marriage in Thailand?
- The foreign partner first obtains an affidavit of freedom to marry from their embassy in Thailand, has it translated into Thai and legalized by the Department of Consular Affairs, and then both parties register the marriage at any district office (amphoe) with passports and two witnesses. Since the Marriage Equality Act took effect on 23 January 2025, same-sex couples register on exactly the same basis.
- Do we need an interpreter at the district office?
- Yes in practice — most district offices require that a foreign party who does not read Thai be assisted by an interpreter, and many request that the interpreter present identification and sign the register. Some offices also expect a prenuptial agreement, if any, to be presented before registration, because a prenuptial agreement in Thailand is only valid when registered together with the marriage.
- Is a Thai marriage recognized in my home country?
- A marriage registered at a Thai district office is generally valid worldwide, but recognition procedures differ: many countries want the Thai marriage certificate and the Kor Ror 2 extract translated, legalized by the MFA and certified by their embassy before it is entered in their civil register. Some countries additionally require registration with their consulate within a set period.
- How is a prenuptial agreement made enforceable in Thailand?
- Under the Civil and Commercial Code a prenuptial agreement must be in writing, signed by both spouses and two witnesses, and registered with the marriage at the district office on the day of registration — an agreement signed afterwards is void as to property arrangements. It also cannot contradict public order or the rules on parental duties, so the drafting must be Thailand-specific rather than a translated foreign template.