Will Contest / Caveat Petition EST-CONTEST

Challenge the validity of a will or the appointment of an administrator.

Who

Heir or interested party who disputes the will

Gov Fee

Court fee 2% of disputed amount (max THB 200,000)

Timeline

6–18 months depending on evidence

Legal Basis

Civil & Commercial Code §1750–1755; CPC

Eligibility

Standing as heir / beneficiary
Within 1 year of knowledge

Required Documents

Will copy
Evidence of defect (forgery, incapacity, undue influence)
Medical/handwriting expert reports

Procedure

Initial assessment of grounds
Engage handwriting/medical experts as needed
File contest petition before estate distribution
Evidence hearings and cross-examination
Judgment + possible appeal

Taxes & Fees

Court fees only

Cross-Border Notes

Foreign expert reports must be translated and notarized for admission.

Translation & Interpretation

Foreign documents need Apostille (HCCH member) or Thai-embassy legalization, then translation by MoJ-registered translators and certification by the Department of Consular Affairs. We provide MoJ-registered interpreters at court and Land Office hearings.

Post-Service Policy

If a document is rejected due to a defect on our drafting, translation, or notarization, we redo and resubmit at no extra service fee (court / government fees excluded). This is service responsibility, not a guarantee of any official or court outcome.

In-Depth Guide: Will Contest / Caveat Petition (EST-CONTEST)

Will Contest / Caveat Petition is delivered under ILC's Thai Wills, Probate and Cross-Border Estate Administration practice, combining MoJ-certified translation, MFA legalization, embassy liaison, and Thai government filing under one project manager. Every case is handled by a NAATI-accredited translator, a Thai Notarial Services Attorney, and a dedicated case coordinator.

Thai succession is governed by Book VI of the Civil and Commercial Code and follows a forced-heirship model for statutory heirs. Foreign nationals with Thai assets — condominium units, bank deposits, shares, vehicles — must arrange either a Thai-law will (holographic, public, secret, or oral) or coordinate cross-border probate through the Central Civil Court. ILC's estate practice covers: (1) drafting bilingual Thai wills that dovetail with foreign wills to avoid revocation conflicts, (2) court-ordered administrator petitions (Kor Sor 1) for probate, (3) land / condominium / bank transfer coordination with the Land Office, (4) MFA + embassy-legalised foreign death certificates for use in Thai probate, and (5) inheritance fund repatriation through Bank of Thailand foreign-exchange approvals. Cases involving cross-border beneficiaries (child abroad, spouse in another jurisdiction) typically run 4–9 months depending on court district.

Why choose ILC for Will Contest / Caveat Petition

With more than 15 years of practice, ILC covers every embassy in Bangkok and both MFA offices (Chaengwattana and Chiang Mai). We operate a two-tier QA review and refund the service fee if a document is rejected due to a defect in our translation or certification — government fees and officer discretion excluded.

How Will Contest / Caveat Petition is Processed

The workflow below reflects current 2025–2026 practice with the relevant Thai authority and factors in queue seasonality, translation dependencies, and cross-agency handoffs.

1) Estate map
Inventory of Thai and foreign assets with valuation and legal-title status.
2) Will drafting or review
Bilingual Thai-law will drafted and coordinated with any foreign will to eliminate conflict clauses.
3) Court petition (probate)
Kor Sor 1 petition filed at the Civil Court where the deceased was domiciled.
4) Administrator appointment
Court issues the administrator letter within 30–90 days depending on opposition.
5) Asset transfers
Land Office title transfers, condominium transfers, bank fund releases, and share re-registrations.
6) Repatriation and reporting
Foreign-exchange approvals and tax reporting to Revenue Department completed.

Documents & Requirements for Will Contest / Caveat Petition

The checklist below covers standard files. Complex or corporate matters can add supplementary certificates, board resolutions, or notarised affidavits; ILC brief these during the intake call.

Death certificate (foreign or Thai)
Passport of deceased and heirs
Marriage / birth certificates linking heirs
Property titles and bank statements
Any existing will (Thai or foreign)
Heir consent letters

Real-World Use Cases: Will Contest / Caveat Petition

Real-world scenarios where clients rely on this service every month, spanning individual, family, and corporate mandates.

Expat with Thai condo

Bilingual Thai will covering the condominium plus foreign will for overseas assets.

Cross-border probate

Coordination between Thai Civil Court and foreign probate registry.

Inheritance fund repatriation

Bank of Thailand approval for transferring inherited funds overseas.

Trust-like structure

Life-time gift plus Thai company holding to smooth asset transition.

Alternative Paths for Will Contest / Caveat Petition

Three delivery paths are usually available. We select the option that balances cost, deadline pressure, and destination-authority preferences.

Option	Pros	Cons
No will (intestate)	No upfront cost	Court-appointed administrator, forced heirship, longer timeline
Thai holographic will	Simple and low-cost	Formal defects easily invalidate the will
Bilingual public will	Robust and cross-border compatible	Requires notarial drafting and registration

FAQs about Will Contest / Caveat Petition

คำถามที่พบบ่อย

Can a foreign will govern Thai assets?

Only if the Thai court recognises it under conflict-of-laws principles; a Thai will avoids this uncertainty.

Is inheritance tax payable in Thailand?

Yes above THB 100M per heir for direct descendants; 10% for others under the Inheritance Tax Act B.E. 2558.

Can a foreigner inherit Thai land?

Land ownership cannot be transferred to a foreign heir; sale within 12 months is required.

Do we need Thai lawyers for probate?

Yes; only Thai-licensed lawyers may appear before Thai courts.

Local Expert Insight

Expert perspective: Will Contest / Caveat Petition

“The Will Contest / Caveat Petition files we see most often are ones the applicant filed themselves and got rejected for an outdated template or a passport-name mismatch — that's why we audit every document before touching translation.”

กองบรรณาธิการ ILC

Legal Documentation Editorial Team

Cost ladder

Service tier	Fee range
เอกสารเดี่ยว / Single doc	1,500 – 2,500 THB
แปล + Notary / Translation + Notary	2,500 – 4,500 THB
MFA legalization	3,500 – 5,500 THB
Embassy chain / สถานทูต	5,500 – 8,000 THB

Timeline (Day 1 → Day N)

Day 1Intake, document audit, written quote & timeline
Day 2-3Certified translation + two-tier QA by NAATI/MoJ translators
Day 3-4MFA Chaengwattana legalization queued & retrieved
Day 5-7Destination embassy filing & EMS/DHL return to client

Case snapshot (anonymized)

A corporate client (name withheld) needed Will Contest / Caveat Petition on a tight embassy deadline. ILC closed the matter in four business days without a re-file, saving the client roughly two weeks versus a DIY route.

Last reviewed: 2026-08-07 · Cross-referenced against MFA Consular practice + Lawyers Council of Thailand

Free quote — LINE @NAATI · Tel 080-5578887

A working guide to Will Estate Probate in Thailand

Will Estate Probate is scoped by a senior specialist during a free intake on LINE Official @NAATI before any paperwork moves. Fees, timelines, required documents, and destination-authority acceptance criteria are all agreed in writing first — a discipline that materially reduces re-work and rejected filings. Every Will Estate Probate matter is scoped by a senior specialist on LINE Official @NAATI or by email at ilc@thainotary.co.th before any file moves.

How the workflow runs end-to-end

Because the audit, translation, notarization, and MFA/embassy legs are all executed under one project number, hand-offs never introduce version drift. What ships to the client is the same file that was audited on day one, with every intermediate stamp attached in the correct order.

Who this service is for

The service handles both one-off private clients (a marriage abroad, a police check for a new employer, a university transcript for a masters programme) and recurring enterprise workflows (monthly work-permit renewals, quarterly BOI reports, ongoing IP filings across multiple jurisdictions).

Coverage, fees, and turnaround

For clients outside Bangkok the pickup and return legs are quoted upfront and paid at cost, so the professional fee stays unaffected by geography. Regional hubs — Chiang Mai, Phuket, Pattaya, Rayong, Khon Kaen, Hat Yai — have partner offices that shorten the round-trip by 24–48 hours versus a pure courier route.

Quality assurance and confidentiality

If a receiving authority ever rejects a deliverable for a translation or certification defect, we re-issue the corrected file at no additional charge and refund any government fees that must be repaid — a policy written into our standard engagement letter, not a discretionary courtesy.

Start your Will Estate Probate matter today

Reach ILC on LINE Official @NAATI, email ilc@thainotary.co.th, or phone 080-5578887. Office hours are Monday to Sunday, 08:30 to 20:00 Bangkok time. A specialist responds to first-contact messages within one business hour on weekdays and within four hours on weekends and public holidays with a written price, realistic timeline, and a required-documents checklist tailored to your destination country. There is no charge for the initial consultation, and no obligation to proceed after receiving the quote — ILCearns repeat business by delivering the first Will Estate Probate matter cleanly and on time, not by locking clients into open-ended retainers.

Local Expert Insight

Expert perspective: Will Estate Probate

“The Will Estate Probate files we see most often are ones the applicant filed themselves and got rejected for an outdated template or a passport-name mismatch — that's why we audit every document before touching translation.”

กองบรรณาธิการ ILC

Legal Documentation Editorial Team

Cost ladder

Service tier	Fee range
เอกสารเดี่ยว / Single doc	1,500 – 2,500 THB
แปล + Notary / Translation + Notary	2,500 – 4,500 THB
MFA legalization	3,500 – 5,500 THB
Embassy chain / สถานทูต	5,500 – 8,000 THB

Timeline (Day 1 → Day N)

Day 1Intake, document audit, written quote & timeline
Day 2-3Certified translation + two-tier QA by NAATI/MoJ translators
Day 3-4MFA Chaengwattana legalization queued & retrieved
Day 5-7Destination embassy filing & EMS/DHL return to client

Case snapshot (anonymized)

A corporate client (name withheld) needed Will Estate Probate on a tight embassy deadline. ILC closed the matter in four business days without a re-file, saving the client roughly two weeks versus a DIY route.

Last reviewed: 2026-08-07 · Cross-referenced against MFA Consular practice + Lawyers Council of Thailand

Notarial services and related certifications

Explore the site

คำถามที่พบบ่อย

When do you use Will Contest / Caveat Petition?

Will Contest / Caveat Petition — Challenge the validity of a will or the appointment of an administrator.

Who is this for?

Heir or interested party who disputes the will

What are the fees and timeline?

Court fee 2% of disputed amount (max THB 200,000); 6–18 months depending on evidence

What is the legal basis?

Civil & Commercial Code §1750–1755; CPC

What documents do I need to prepare?

Will copy; Evidence of defect (forgery, incapacity, undue influence); Medical/handwriting expert reports

What is the procedure?

Initial assessment of grounds; Engage handwriting/medical experts as needed; File contest petition before estate distribution; Evidence hearings and cross-examination; Judgment + possible appeal

What taxes apply?

Court fees only

Anything cross-border parties should be aware of?

Foreign expert reports must be translated and notarized for admission.

Rejection policy?

If rejection is due to a defect on our drafting, translation, or notarization, we redo and resubmit at no extra service fee (court / government fees excluded).