The short answer
The Office of the Consumer Protection Board, the OCPB, is the general consumer complaints body in Thailand. Under the Consumer Protection Act B.E. 2522 it receives complaints from consumers who have suffered trouble or damage from the acts of a business operator. Its Board can mediate a dispute before any court case and can bring a case itself. The table gives the main points.
| Question | Answer from the sources read | Where it comes from |
|---|---|---|
| Who can complain | A consumer: a buyer or a person who receives a service from a business operator. Buying includes renting | Consumer Protection Act, section 3 |
| Against whom | A business operator: a seller, which includes a person who lets property, or a service provider | Section 3 |
| Channels | Online at complaint.ocpb.go.th and through the office's apps, in person or by letter in Bangkok, hotline 1166, and the Damrongtham center in every province | OCPB complaint page |
| Main documents | Complaint form, ID card or passport copy, contract, receipts and other evidence, power of attorney if someone acts for you | OCPB citizen manual |
| Language | Foreign-language documents must be translated into Thai when the office asks | OCPB complaint page; notice of 23 January 2026 |
| What the office does | Checks the facts, contacts the business, mediates, and can put the file to the Board to consider a court case | OCPB complaint page; Board regulation of 2019 |
| Court case by the Board | Possible where the Board considers it would benefit consumers as a whole. Exempt from all court fees | Sections 39 and 39/1 |
| Effect on time limits | Filing a complaint does not stop or interrupt the limitation period, and does not remove your right to sue | OCPB complaint page |
The Act was read in Thai in the latest consolidated text on the Office of the Council of State law search on 14 November 2026. The OCPB pages were read in Thai on the same day.
The sections below take each row in turn. If the dispute is about money a landlord or a seller owes you and talks have failed, read our guide to small claims court in Thailand alongside this one, because a complaint to the office does not replace a court claim.
The legal meaning of consumer and business operator
The office only takes a complaint from a consumer about a business operator, and it turns away a complaint where the person is not a consumer under the Act. The definitions in section 3 are wider than the everyday words.
- Consumer. A buyer, or a person who receives a service from a business operator, or a person who has been offered or invited to buy goods or take a service. It includes a person who lawfully uses the goods or receives the service without being the one who paid.
- Business operator. A seller, a manufacturer for sale, an importer for sale, a buyer for resale, or a service provider. It includes an advertising operator.
- Buy and sell. To buy includes to rent, to take on hire-purchase or to acquire in any way for money or another benefit. To sell includes to let, to let on hire-purchase or to supply in any way for payment, and includes offering or inviting someone to do so.
- Service. Taking on work, granting a right, or letting someone use or benefit from property or a business for payment. Employment under labor law is excluded.
Two results follow for readers of this site. A tenant fits the definition of a consumer, because renting is buying, and a buyer of a condo from a developer plainly does. An employee does not: employment is outside the definition of a service, and our guide to severance pay in Thailand covers that route.
Section 4 lists what a consumer is entitled to. There are five rights:
- To receive correct and sufficient information, including a description of quality, about goods or services.
- To be free to choose goods or services.
- To be safe in using goods or services.
- To be treated fairly in making a contract.
- To have an injury considered and compensated.
The section ends by saying these rights apply as the relevant laws or the Act itself provide. They are the frame for a complaint, not a claim for money in themselves.
A 2025 notification of the Contract Committee makes residential letting a contract-controlled business where the landlord has three or more units, and calls the two sides business operator and consumer. For an owner who lets one or two homes, the Act's definition of selling still includes letting, but the sources read for this guide do not say whether the office will take the complaint. Ask on 1166 before relying on this route.
Before you complain: talk to the business and pick the right agency
Three checks come before the complaint form.
1. Raise it with the business first. The office's own questions and answers page tells a complainant to contact and negotiate with the business first, to see what responsibility it will take. If the answer seems unfair, the page says to complain to the office straight away. Do this in writing and keep the reply: it becomes evidence.
2. Check whether another agency is in charge. Section 21 of the Act says that where another law deals specifically with a matter, that law applies, and the consumer protection chapter applies only as far as it does not duplicate or conflict with it. The office's list of complaints it does not take includes one where the person has a specific right to be considered and compensated under another law. In practice, a complaint about a regulated sector goes to that sector's regulator.
| Subject | Agency | Number | Read on |
|---|---|---|---|
| Banks and financial services | Bank of Thailand | 1213 | Bank of Thailand contact page |
| Insurance claims and unpaid benefits | Office of Insurance Commission | 1186 | OCPB questions and answers page |
| Mobile signal, internet quality, unwanted paid messages | National Broadcasting and Telecommunications Commission | 1200 | OCPB questions and answers page |
| Matters under the Food and Drug Administration | Food and Drug Administration | 1556 | FDA contact page |
| Matters under the Department of Internal Trade, Ministry of Commerce | Department of Internal Trade | 1569 | Department of Internal Trade home page |
| General goods, services and contracts | Office of the Consumer Protection Board | 1166 | OCPB complaint page |
Numbers read on 14 November 2026. The insurance and telecom numbers are as the OCPB states them; those regulators' own contact pages did not show a number or did not open.
If you file with the office anyway, the complaint is not lost. Under the current intake rule, where another agency is responsible under section 21 the office sends the matter to that agency and tells the complainant in writing within twenty working days of receiving it. Section 21 also lets the office step in to give a consumer initial help even where a specific law exists.
3. Ask whether it is a crime. The office's questions and answers page says that a seller who stalls, does not deliver, does not refund and cannot be contacted may be committing fraud, and that the buyer must report it to the police investigator in the area where it happened within three months of learning of the matter and of who did it. A consumer complaint does not replace that report. Our guide to rental scams covers the warning signs, and the guide to the tourist police covers who to call.
Then collect the paper. The next two sections cover where the complaint goes and what to attach.
Channels for filing a complaint
The office's complaint page says a complaint can be filed, and its status checked, in two forms: through the office's online systems, or on site. The table sets out every channel named on the pages read.
| Channel | Detail | Source |
|---|---|---|
| Complaint website | complaint.ocpb.go.th. Register, log in, enter the business and the complaint, attach evidence, receive a reference number | OCPB complaint page and help page |
| Office website | ocpb.go.th is named as a second online route | OCPB complaint page |
| Mobile app | OCPB Connect | OCPB complaint page |
| Line | The Line account OCPB Connect | OCPB complaint page |
| Government app | Tang Rath, the government services app | OCPB complaint page |
| In person, Bangkok | Office of the Consumer Protection Board, 120 Moo 3, Ratthaprasasanabhakti Building, 5th floor, Government Complex, Chaeng Watthana Road, Thung Song Hong, Lak Si, Bangkok 10210. The office's English outline places the complaint center on the 1st floor, south zone | OCPB complaint page; questions and answers page |
| By letter | To the same address. An older office page says an ordinary letter is accepted if it carries all the details the complaint form asks for | OCPB complaint page; form page of 2012 |
| Hotline | 1166. Hours in the citizen manual: 08.30 to 16.30, with an automated answering system in and out of hours | OCPB complaint page; citizen manual |
| Email shown for contact | consumer@ocpb.mail.go.th | OCPB complaint page |
| Outside Bangkok | The Damrongtham center in every province. The questions and answers page adds every municipality, every subdistrict administrative organization and Pattaya City | OCPB complaint page; questions and answers page |
Read on 14 November 2026. The citizen manual is a scanned file dated March 2019, so its hours may have changed. The officer chat on the complaint page is open Monday to Friday, except public holidays, from 08.30 to 16.30.
A complaint that arises in a province is normally handled there. The Board's regulation says the office sends a complaint whose facts arose in a province to the provincial consumer protection sub-committee of that province, unless the matter is complex or large. So a dispute over a villa in Phuket or a condo in Chiang Mai can be filed and dealt with locally.
The help page for the online system refers to entering a Thai ID card number at registration, and does not say how a person without one registers. The walk-in desk, a letter, 1166 and the provincial centers do not depend on the website, and the office's document list provides for a passport copy from a foreign complainant.
Documents to prepare
The office's citizen manual for the complaint desk lists the documents used to support a complaint. Not every item applies to every case. For a rental or a property purchase the ones that matter are these:
- The complaint form, or the online equivalent.
- Proof of identity. A copy of the ID card and house registration for a Thai complainant. A copy of the passport for a foreigner.
- A power of attorney if someone else files or attends for you.
- The contract. The lease, the reservation agreement or the sale and purchase agreement.
- Receipts and invoices for everything you paid.
- Advertising material. The brochure, listing or web page that made the promise you are relying on.
- Photographs.
- Bank records showing the transfers.
- A copy of a police daily report, if you made one.
- Anything else that serves as evidence, such as messages with the business.
The same manual lists product labels, vehicle registration books and repair slips for other kinds of complaint.
Translations. A notice the office published on 23 January 2026 lists translated documents among the things a foreign complainant needs. The complaint page says the office closes a complaint where the consumer does not provide a Thai translation of foreign-language documents within the time set. A lease written only in English is a foreign-language document. Our property document translation checklist covers what a usable translation looks like.
Acting through someone else. The office says a complainant may send another person to meet the officer and explain the facts, with a power of attorney and copies of the ID of both the person giving it and the person receiving it. The complaint page lists, among the complaints the office does not take, one where the power of attorney does not carry the stamp duty the law requires and the defect is not fixed in time. Our guide to powers of attorney in Thailand explains how one is made.
Sign the complaint. An unsigned complaint, an unclear one, and one with no supporting documents are all on the list of complaints the office may refuse if they are not corrected after it asks.
Filing online, step by step
The help page of the complaint system sets out five steps.
- Go to complaint.ocpb.go.th. This is where a complaint is submitted.
- Enter the business and the subject. Give the details of the party you are complaining about and what the complaint concerns.
- Log in. If you have not registered, register as a member first.
- Complete the complaint and attach the evidence. Fill in every field and upload the supporting documents.
- Keep the reference number. The system issues a number for tracking the complaint and notifies you in the system and by SMS.
Under the Board's regulation an online complaint takes effect when the system has confirmed receipt to the complainant. Until you have the confirmation and the number, treat the complaint as not filed.
Before you submit, the complaint page asks you to accept five points. They are worth reading slowly, because they define what the complaint will and will not do for you:
- Complaining to the office does not stop or interrupt the limitation period.
- Complaining does not take away the consumer's right to take the matter to court personally.
- A consumer who does go to court must tell the office in writing so the complaint can be closed.
- The complainant is responsible for checking, with the Legal Execution Department, whether the business is under a rehabilitation order or is bankrupt.
- If no officer has made contact fifteen days after the complaint, follow it up, and follow it up every month.
OCPB Fasttrack. The complaint page says the system checks whether the business complained about has joined a program called OCPB Fasttrack. If it has, the complainant is offered that route, under which the complaint goes to the company to resolve. If it is not settled within the time the program allows, the complaint returns to the office's normal process, where an officer continues with the steps, sets a mediation appointment or passes the matter to another agency. The page does not state the time allowed.
Walking in follows the same logic. The citizen manual says a visitor hands over the evidence and writes out the complaint. If the documents are complete, staff record and scan them and issue a reference number. If they are not, the visitor is asked to bring the rest next time or to use another channel.
After you file: checks, contact and mediation
The office publishes a five-stage outline of its procedure in English: receiving the complaint, mediation at officer level, mediation at sub-committee level, screening by a sub-committee, and consideration by the Consumer Protection Board. The Board's regulation on service to the public, first issued in 2019, fills in the steps.
| Step | What the rules say | Where |
|---|---|---|
| Intake, evidence sufficient | The file goes to the responsible unit within fifteen working days of the day the complaint was received | Clause 7 as replaced by amendment No. 3 |
| Intake, evidence not sufficient | The complainant is asked to explain or send more within fifteen days. Once enough has arrived, the file is forwarded within five working days | Clause 7 as replaced by amendment No. 3 |
| Another agency is responsible | The matter is sent to that agency and the complainant is told in writing within twenty working days | Clause 7 as replaced by amendment No. 3 |
| An officer is assigned | Within three working days of the unit receiving the file | Clause 8, 2019 text |
| The officer's first work | Check the facts, the points complained of, what the complainant wants and the evidence; check the law; contact the parties for more facts or for initial mediation. Contact or a letter to the parties within fifteen days | Clause 10, 2019 text |
| How officers make contact | By letter, telephone, email, the online mediation system, social media or another system the office sets | Clause 12, 2019 text |
| Meeting the parties | The officer asks whether they wish to mediate. If they settle, the officer draws up a memorandum of agreement or a compromise agreement | Clause 15, 2019 text |
| Deadlines that cannot be met | The officer reports the reason and a superior may extend the time | Clause 22, 2019 text |
From scanned copies of the Board regulation of B.E. 2562 (given 14 March 2019) and its amendment No. 3, which cites a Board meeting of 24 August 2026, read on 14 November 2026. Amendment No. 2 of B.E. 2567 could not be read, so a clause marked 2019 text may have been changed by it. These are the office's internal targets, not a promise of a result by a date.
Mediation is by agreement. Section 10 (1/1) of the Act gives the Board the power to mediate or conciliate a dispute about a violation of consumer rights as the consumer and the business operator agree, before a case is filed in court. The wording rests on what the two sides agree. In the provinces, the office says that the officer checks the facts and then invites both sides in writing to negotiate. If officer-level talks fail and both sides want to continue, the matter goes to the provincial mediation sub-committee.
Online mediation. The office runs an online dispute mediation system named OCPB Mediate at ocpbmediate.ocpb.go.th. Complainants reach it through their registration on the complaint system, businesses register on it directly, and its login page offers Thai and English.
The Board has a separate regulation of 2016 on mediation criteria. It was opened for this guide but its text could not be read, so this page gives no limit on the number of mediation sessions or on how long mediation may last.
A written settlement is a contract. Read it before signing, make sure it names the amount and the date, and ask for a copy. If the business then does not pay, that agreement is what a court claim would rest on.
The Board taking a business to court for a consumer
If mediation fails, the file can go up. The office's list of what it does with a complaint ends with putting the matter to the Consumer Protection Board to consider using its power to sue under section 39. It is the last stage of the complaint route.
- The test. Section 39 applies where the Board thinks it proper to take proceedings over a violation of consumer rights, or where a consumer whose rights were violated asks and the Board considers that the proceedings would benefit consumers as a whole.
- Who runs the case. The Board appoints a consumer protection officer: a public prosecutor, or an official of the office who holds at least a law degree. That officer conducts civil and criminal proceedings in court.
- What can be claimed. The officer may claim property or damages for the consumer who made the request.
- Fees. The proceedings are exempt from all court fees.
- The Secretary-General. Section 39/1, added in 2019, gives the Secretary-General of the Board a parallel power to bring a case on a consumer's behalf through officials of the office, with the same exemption from fees.
The 2019 regulation describes what follows a resolution to sue. The office prepares the case file within fifteen working days. It sends the business a letter ending the contract or demanding performance, with fifteen days to comply. If the business does not, the file goes to the consumer protection officer within seven working days. A coordinator follows the case with that officer every three months and tells the consumer the result once the judgment is final.
The Board decides whether to sue, and the test looks at consumers as a whole. The office's list of grounds for closing a complaint includes one where suing would not benefit consumers as a whole under section 39. A one-off argument over a single deposit may not meet it. The office also does not take a complaint where the consumer hired a lawyer for the case and the lawyer asks the Board to sue instead, and it does not take one that asks it to enforce a judgment already won.
Two other bodies can sue for consumers. Under sections 40 and 41, an association or foundation whose purpose is consumer protection may apply to be recognized by the Board, for two years at a time, and may then bring civil and criminal cases and claim property and damages for a consumer who gives it a written mandate. It needs the consumer's written consent to withdraw the case or settle it.
And you can sue yourself. A consumer case filed by a consumer is exempt from court fees under the Consumer Case Procedure Act, as our small claims guide sets out. If you would rather be represented, see the guide to hiring a lawyer in Thailand.
Limits: complaints the office turns away and things a complaint does not do
The complaint page lists twelve kinds of complaint the office does not take. Read the list before filing, because several depend on the order in which you do things.
- The complainant has already filed the same matter in court, or it is pending in a court.
- The complainant has joined a class action as a group member.
- A court has already given a final judgment or order.
- The complainant wants the office or the Board to enforce a judgment.
- The business is in bankruptcy or business rehabilitation proceedings.
- The limitation period for the case has run out.
- The complainant is not a consumer under the Consumer Protection Act.
- The claim is for damage from buying goods or using a service that is illegal.
- The complainant hired a lawyer to bring the case, and the lawyer asks the Board to sue instead.
- The complainant has a specific right to be considered and compensated under another law.
- The complainant has already used a civil claim attached to a criminal case against the business.
- The complaint is unclear, cannot be understood, is unsigned, has no supporting evidence, or rests on a power of attorney without the required stamp duty, and the complainant does not fix it in the time given after written notice.
A complaint that was accepted can still be closed. The grounds on the same page include: the consumer or someone acting for the consumer files in court; neither the officer nor the consumer can find the name and address of the business; the evidence shows the consumer was the one in breach, claimed more than the real loss or was not wronged; the two sides settle; the consumer does not respond, does not send documents or does not supply Thai translations in time; and suing would not benefit consumers as a whole.
Three practical limits follow from all this.
- The clock keeps running. A complaint does not stop or interrupt the limitation period. If you wait for mediation until the period has passed, the office will not take the matter on and a court claim may be barred too. Work out the deadline for a court claim at the start. Which period applies to a particular claim is a question for a lawyer.
- Court and complaint do not run together for long. You may sue while a complaint is open, but you must then tell the office in writing, and the complaint is closed. So the choice of when to go to court is yours, and going to court ends the office's role.
- You need to know who the business is. A complaint is closed if the name and address of the business cannot be found. Before you pay a deposit to anyone, record the legal name on the contract, the ID or company registration number, and an address. Our guide to security deposits explains how deposits work.
No page read for this guide says how long a complaint takes from start to finish, and none gives a success rate, so this guide gives neither.
Renting and buying property: where this route fits
Property is one of the fields the office deals with. Its staff handbook for serving foreign visitors includes sample conversations for taking a real estate complaint and a word list with lease agreement and title deed in it. The points below are the ones the sources read speak to.
Tenants of landlords with three or more units. The 2025 Contract Committee notification on residential leasing makes letting homes a contract-controlled business where the landlord has three or more units and the tenant is an individual renting to live there. A lease from such a landlord must follow the standard contract and must not contain the prohibited terms. A dispute with such a landlord over a deposit or a prohibited term falls within the definitions the complaint system uses. Our guides to getting your rental deposit back, rent increases and late rent fees set out what the notification requires.
Buyers from developers. The office's questions and answers page carries two short answers on home purchases. They are the office's general answers, not rulings on a contract:
- The bank refuses the loan. The office's answer is that the business may keep the booking money and the contract money, but must return other payments such as the down payment and money paid for decoration.
- The home is unfinished and the developer presses for transfer. The office advises the buyer to write to the project asking to put off the transfer until the building work is complete.
Your own contract may say something different, and the contract and the law decide, so check both before acting on either answer. Our guides to buying off-plan property in Thailand, the reservation agreement checklist and condo handover and defect inspection cover the stages where these disputes start.
A sensible order of steps. For a tenant or a buyer with a money dispute, the sources read support this sequence:
- Write to the business, say what you want and by when, and keep the reply.
- Work out the last day for a court claim, with advice if the sum matters.
- Collect the contract, receipts, transfers, photographs and messages, and have foreign-language documents translated into Thai.
- File the complaint online, in person or through the provincial center, and keep the reference number.
- Follow up after fifteen days if nobody has contacted you, and monthly after that.
- Attend mediation, or send someone with a power of attorney. Get any settlement in writing.
- If there is no settlement and the deadline is approaching, decide whether to file in court yourself, and tell the office in writing if you do.
This guide does not cover complaints about a condominium's juristic person or co-owners, disputes between private individuals who are not in business, or complaints about an agent's conduct. For the rules a tenant can rely on in general, see our guide to tenant rights in Thailand.
Frequently asked questions
Complain to the Office of the Consumer Protection Board. Its complaint page lists two ways: online, through complaint.ocpb.go.th, the office website, the OCPB Connect app, the Line account OCPB Connect or the Tang Rath government app; or on site, in person or by letter to the office at the Government Complex on Chaeng Watthana Road in Bangkok. It also names hotline 1166 and the Damrongtham center in every province.
1166 is the hotline of the Office of the Consumer Protection Board. The office's citizen manual gives its hours as 08.30 to 16.30 with an automated answering system in and out of office hours. The manual read for this guide is an older file, so treat the hours as a guide. No page that opened for this guide states that the hotline has an English option.
The sources read point to yes. The Consumer Protection Act defines a consumer as a buyer or a person who receives a service, with no nationality condition. The office's document list includes a copy of a passport for foreigners, and a January 2026 notice lists translated documents for a foreign complainant. The office closes a complaint if foreign-language documents are not translated into Thai when asked.
The office's citizen manual lists the complaint form, a copy of an ID card or, for foreigners, a passport, a copy of the house registration, a power of attorney if someone acts for you, and the evidence: the contract, receipts, invoices, advertising, photographs, bank records and anything else that proves the claim. A complaint with no supporting documents can be refused if the gap is not fixed in time.
No. The complaint page says in terms that complaining to the office does not stop or interrupt the limitation period. It also says a complaint does not take away your right to sue on your own. If the deadline for a court claim is close, take legal advice and do not wait for the complaint to finish.
The office's own outline has five stages: receiving the complaint, mediation by an officer, mediation by a sub-committee, screening by a sub-committee, and consideration by the Consumer Protection Board. Officers check the facts and the law, contact the business, and ask both sides whether they want to mediate. If the two sides settle, the officer writes up the agreement.
It can, but it is not automatic. Section 39 of the Act lets the Board appoint a consumer protection officer to bring a civil or criminal case, and to claim property or damages for the consumer who asked, where the Board considers the case would benefit consumers as a whole. The case is exempt from all court fees. The office closes a complaint where suing would not meet that test.
The Act counts renting as buying and letting as selling, so a tenant can be a consumer and a landlord a business operator. A 2025 Contract Committee notification makes residential letting a contract-controlled business where the landlord has three or more units. The sources read for this guide do not say whether the office will take a complaint against an owner letting one or two homes.
Its complaint page lists twelve. They include a matter already filed in court or already decided, a business in bankruptcy or rehabilitation, a claim whose limitation period has run out, a complainant who is not a consumer under the Act, a claim over illegal goods or services, a matter with its own remedy under another law, and a complaint that is unclear, unsigned or has no evidence and is not corrected in time.
No source read for this guide gives a total time. The office's regulation sets internal steps: where the evidence is sufficient the intake desk sends the file to the responsible unit within fifteen working days, and where another agency is responsible the complainant is told in writing within twenty working days. The complaint page tells you to follow up if no officer has contacted you after fifteen days, and monthly after that.
Start with a listing you can check
Live homes for rent and sale with asking prices, photos and the name of the agency or owner behind each one, so you know who you are dealing with before any money moves.
General information only, not legal advice. The Consumer Protection Act was read in Thai in the consolidated text published by the Office of the Council of State; the English wording here is our own summary, not an official translation. The Board regulations and the citizen manual were read from scanned copies, and one amendment could not be read, so clause numbers and time limits may have changed. Hotline numbers and office details were read on 14 November 2026 and can change. The office decides whether it takes a complaint. A lawyer should review any dispute that matters to you. BAANLYY LLC is a Nevada company and a listing portal: homes on this site are listed by independent owners, agents and agencies, and BAANLYY is not a party to their leases or sales. Legal rules are from the sources named below, read on 14 November 2026.
Sources
- Consumer Protection Act B.E. 2522 (Thai, latest consolidated text, in force, gazetted 4 May 1979; last amended by Act No. 4 B.E. 2562): s.3 definitions of consumer, business operator, buy, sell and service; s.4 the five consumer rights; s.10 (1) complaints, (1/1) mediation before a court case, (7) proceedings; s.20 (1) the Office receives complaints; s.21 specific laws; s.39 and s.39/1 court cases on a consumer's behalf, exempt from fees; ss.40-41 associations and foundations ↗Office of the Council of State (law index entry with the consolidated text) · Accessed 14 November 2026
- OCPB consumer complaint system, new complaint page (Thai): online and on-site channels, office address and contact email, officer chat hours, the five points a complainant accepts (no effect on the limitation period, right to sue kept, written notice if suing, follow up after 15 days), twelve kinds of complaint not taken, grounds for closing a complaint, OCPB Fasttrack, Thai translations of foreign-language documents ↗Office of the Consumer Protection Board · Accessed 14 November 2026
- OCPB consumer complaint system, help page (Thai): the five steps for filing online, from entering the business complained about to receiving a reference number in the system and by SMS ↗Office of the Consumer Protection Board · Accessed 14 November 2026
- OCPB frequently asked questions (Thai, with an English section for foreign consumers): negotiate with the business first, sending a representative with a power of attorney, where to complain outside Bangkok, officer mediation then the provincial mediation sub-committee, insurance (1186) and telecom (1200) complaints, police report within three months where a seller disappears, two answers on home purchases, and the English outline of channels and the five-stage procedure ↗Office of the Consumer Protection Board · Accessed 14 November 2026
- OCPB citizen manual for the complaint desk and hotline 1166 (Thai, scanned PDF, 12 pages, first 7 read; file dated 19 March 2019): documents that support a complaint including a passport copy for foreigners, walk-in steps and the reference number, opening hours 08.30 to 16.30 ↗Office of the Consumer Protection Board · Accessed 14 November 2026
- Consumer Protection Board regulation on service to the public by the OCPB B.E. 2562 (Thai, scanned PDF, 11 pages; given 14 March 2019): clause 8 officer assigned in three working days, clause 10 checks and contact within fifteen days, clause 12 means of contact, clause 15 mediation and written settlement, clauses 16 and 18 referral to the Board, clause 21 steps after a resolution to sue, clause 22 extensions, clauses 25-26 online complaints, complaints sent to the provincial sub-committee ↗Office of the Consumer Protection Board · Accessed 14 November 2026
- Amendment No. 3 to the Board regulation on service to the public (Thai, scanned PDF, 3 pages; cites the Board meeting of 24 August 2026): new clause 7, file forwarded within fifteen working days where evidence is sufficient, fifteen days to ask for more and five working days to forward after it arrives, written notice within twenty working days where another agency is responsible under s.21 ↗Office of the Consumer Protection Board · Accessed 14 November 2026
- OCPB notice of 23 January 2026 on what a complainant needs (Thai): a power of attorney if someone else attends, and translated documents if the complainant is a foreigner ↗Office of the Consumer Protection Board · Accessed 14 November 2026
- OCPB Mediate, the online dispute mediation system (Thai login page with a Thai and English switch): business registration on the system, complainants register through the complaint system ↗Office of the Consumer Protection Board · Accessed 14 November 2026
- OCPB complaint form page of 16 November 2012 (Thai): the form may be downloaded, or an ordinary letter with the same details may be posted to the office at the Government Complex, Chaeng Watthana Road, Bangkok 10210 ↗Office of the Consumer Protection Board · Accessed 14 November 2026
- OCPB handbook for assisting foreigners (Thai and English, scanned PDF, 30 pages, first 10 read; file dated 9 November 2021): a staff aid with a Thai-English word list (passport, power of attorney, lease agreement, title deed) and sample English conversations, including taking a real estate complaint ↗Office of the Consumer Protection Board · Accessed 14 November 2026
- Bank of Thailand contact page (Thai): telephone 1213 and the email address for complaints about financial services ↗Bank of Thailand · Accessed 14 November 2026
- Food and Drug Administration contact page (Thai, updated 22 April 2024): call center 1556 and the complaints email address ↗Food and Drug Administration, Ministry of Public Health · Accessed 14 November 2026
- Department of Internal Trade home page (Thai): complaints and call center 1569 ↗Department of Internal Trade, Ministry of Commerce · Accessed 14 November 2026
- Royal Gazette print of the Contract Committee Notification B.E. 2568 on residential leasing (vol. 142, special part 211 Ngor, 6 June 2025): three or more units, clause 6.1 (3) and 6.2 (4) no term allowing a change to the rent or service charges before the lease ends, clause 6.1 (8) and 6.2 (9) no renewal fee from an existing tenant, clause 6.1 (6) utility rates, clause 6.1 (2) advance rent and deposit, clause 10 earlier leases ↗Chon Buri City Municipality (copy of the Royal Gazette print) · Accessed 14 November 2026
- Consumer Case Procedure Act B.E. 2551 (Thai, latest consolidated text, in force, gazetted 25 February 2008): s.3 definitions, s.8 President of the Court of Appeal decides whether a case is a consumer case, s.14 negotiation stops the limitation period, s.17 venue when a business operator sues a consumer, s.18 consumer exempt from court costs and fees, s.20 oral or written complaint, ss.24-27 first hearing, s.29 burden of proof, ss.33-35 evidence and adjournments, s.39 remedy, s.42 punitive damages, s.44 company defendants, ss.46-47 appeal ↗Office of the Council of State (law index entry with the consolidated text) · Accessed 14 November 2026
Official primary sources are listed above with the date we last checked them. Thai rules, fees, thresholds and procedures change and can be applied differently by individual offices and embassies — confirm the current requirement with the responsible authority before relying on it. General information only, not legal, tax or medical advice. BAANLYY never takes paid placement in editorial content.