Legal service for foreign clients
Denied Insurance Claims — Recovering the Indemnity You Are Owed in Thailand
A denial letter is not a verdict. The clause an insurer leans on usually reads more than one way.
Quick answer
Most denials rest on three grounds: non-disclosure when the policy was taken out, an exclusion said to cover the event, or late notification. In each case the burden of proof sits with the insurer, not with you. We start by reading the full policy with every endorsement, compare it against the adjuster's file, then pick the cheapest effective route — negotiation, a regulatory complaint, policy arbitration, or court. From THB 25,000.
From THB 25,000 — From THB 25,000 for negotiation and regulatory stages; court work priced separately by claim size. · Negotiation 30–90 days; consumer court 6–14 months
Who this is for
- Life or health policyholders accused of hiding a pre-existing condition
- Motor policyholders refused repair or total-loss payment
- Factories and shops claiming fire, flood, or business interruption
- Beneficiaries facing delay on a death benefit
- Foreign nationals whose travel or expat health cover refused a hospital bill
What you receive
- Clause-by-clause policy reading flagging wording that can be read in your favour
- Requests for the adjuster's file and loss-assessor report
- A rebuttal letter grounded in statute and comparable judgments
- Filing with the insurance regulator and following the conciliation
- Consumer-case litigation, which in many claims carries no court fee
Documents to prepare
- Full policy, quotation slip, and the original application form
- The denial letter with its envelope and date received
- Medical records, receipts, police report, or damage assessment
- Premium payment history and records of talks with the agent
How it works
5-step process
- 1
Audit the policy and the stated reason
Match the refusal wording against the actual policy text; exclusions are often cited for events they do not reach.
- 2
Build your side of the record
Gather medical files, damage photographs, and witness statements before they disappear.
- 3
Formal negotiation
Serve a rebuttal with a reply deadline so the insurer can reverse itself without litigation.
- 4
Use the regulator
File with the supervisor to enter conciliation that binds once both sides agree.
- 5
Sue and enforce
File as a consumer case seeking the sum insured, interest, and damages for delay.
In depth
Denied Insurance Claims — Recovering the Indemnity You Are Owed: what foreign clients need to know
Most people read their policy properly for the first time on the day a claim is refused. That document was written in advance by the side that knew exactly how each line would be used once a loss occurred. An effective challenge is therefore not a story about hardship: it is a demonstration that the event does not match the wording relied on, and that the burden of proving an exclusion rests with the insurer.
Three grounds insurers use, and where each is weak
The first ground is misrepresentation or non-disclosure at application. The insurer must establish three layers: that the applicant actually knew the fact, that it was material enough to change acceptance or pricing, and that avoidance was exercised within the statutory period. Miss any one of them and the refusal collapses.
The second ground is exclusion, where wording decides everything. Exclusions are construed narrowly, and ambiguity is read in favour of the insured. Common battlegrounds are hazardous activity, use of a vehicle outside its stated purpose, and damage attributed to wear and deterioration — all frequently read wider than the text supports.
The third is late notification, and it is the most often defeated. Delay forfeits cover only where it genuinely prejudiced the insurer's investigation, not merely because a date in the policy passed. A claimant still hospitalised, or one whose house was destroyed, has a reason courts accept.
The adjuster's file is the evidence most people forget to request
A denial letter rarely runs a full page and uses neutral language. Inside the company, however, sits a file recording the reasoning, the consulting doctor's opinion, and the loss assessor's report. That file often shows the internal view was far less unanimous than the letter implies.
Documents can be requested directly and through the regulator. Once obtained, we build a timeline of who decided what and on which material. It is common to find the conclusion was reached before the complete medical file arrived — a far stronger argument than debating interpretation alone.
Choosing the forum: negotiation, regulator, or court
Negotiation suits disputes about amount rather than principle, because insurers can approve a gap quickly once litigation risk is visible. A regulatory filing suits cases needing systemic pressure at low cost, and a signed conciliation outcome genuinely binds.
Suing as a consumer case carries an advantage many claimants miss: in many claims there is no ad valorem court fee, and facts within the business's own knowledge must be proved by the business. That shifts the balance sharply compared with ordinary civil litigation.
Before recommending a forum we weigh the amount in dispute, how clear the wording is, and how urgent payment is. A patient funding ongoing treatment bears a much higher cost of waiting than a business awaiting property indemnity, so the choice must price both prospects and delay.
Cost structure: government fees vs professional fees
| Item | Official fee | Professional fee | Note |
|---|---|---|---|
| Policy review with a written opinion | None | THB 8,000–15,000 | Credited against the next stage if you proceed |
| Rebuttal letter and negotiation | None | From THB 25,000 | Includes two rounds of follow-up |
| Regulatory filing and conciliation | No filing fee | THB 20,000–35,000 | Depends on the number of sessions |
| Consumer case at first instance | Court fee commonly exempt | From THB 45,000 | Large claims priced proportionally |
Health cover refused as pre-existing
Situation: The insured had surgery 14 months after inception; the insurer said symptoms predated the policy.
What we did: We obtained the full medical history and had the treating physician separate general symptoms from the later diagnosis.
Outcome: The insurer reversed and paid in full before any court stage.
Warehouse fire claim scaled down
Situation: The assessor's figure fell far below recorded stock value, citing missing inventory proof.
What we did: We assembled purchase orders, monthly stock reports, and pre-fire camera footage to rebuild the figure.
Outcome: Settled near book value at the conciliation stage.
When to act, and when waiting is fine
The denial letter arrived within the last 30 days
Start now — document requests are answered more completely in this window.
A partial payment is offered against a full release
Do not sign before assessment; a release closes the remaining claim entirely.
The sum is modest and the dispute is about amount
Use regulator conciliation before filing suit.
Nearly two years have passed since the loss
File to preserve prescription; negotiation does not interrupt it.
FAQ
Frequently asked questions
The insurer says I hid an illness — must I accept?
No. The insurer must prove you knew and deliberately withheld, and must avoid the policy within the statutory window.
Is there a court fee to sue an insurer?
Consumer cases are commonly exempt, making the cost far lower than an ordinary civil suit.
How long do I have to claim?
Generally two years from the loss, but act at once because evidence decays quickly.
Can I demand the adjuster's file?
Yes, and you should — the internal reasoning is usually fuller than the denial letter.
Do I get interest for the delay?
Yes. Courts award interest from default and may add damages where the delay had no justification.
The agent said one thing but the policy says another
Keep the conversation records; an agent's representations can bind the insurer as its representative.
Surgery is needed now but approval has not come
Treat first and keep complete records; reimbursement rights survive if the treatment is covered.
The insurer is foreign — where do I sue?
If the policy was sold and premiums collected in Thailand you can normally sue here, subject to the jurisdiction clause.
How much can I claim for delay?
It depends on provable loss such as loan interest carried while waiting or income foregone.
Related services
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Medical Malpractice — Claims Against Doctors & Hospitals
Medical cases are not won on the feeling that treatment went badly. They are won on records and expert opinion.
Written by: Thai Law & Accounting Services — attorneys and licensed accountants
Reviewed by: Reviewed by a Notarial Services Attorney registered with the Lawyers Council of Thailand.
Last updated: 2026-08
Information as of August 2026. Government fees and processing times change — verify with the relevant agency before acting, or let our team verify for you.