Table of Contents
- Introduction — Consumer Rights and Marketer Responsibilities
- The Five Fundamental Consumer Rights
- Advertising Law — Four Categories of Illegal Advertising & Penalties
- Consumer Protection in E-Commerce
- FDA-Controlled Products Requiring Pre-Approval
- Influencer and Sponsored Content Disclosure Rules
- Consumer Complaint Channels
- Practical Checklist for Marketers
- References
Introduction — Consumer Rights and Marketer Responsibilities Overview of the Legal Framework
Consumer protection law in Thailand establishes the binding framework within which all marketing and advertising activities must operate. Violations do not merely create legal exposure — they can permanently damage brand reputation, trigger regulatory enforcement action, and in serious cases result in imprisonment for individual executives responsible for non-compliant campaigns.
The primary statute governing consumer protection in Thailand is the Consumer Protection Act B.E. 2522 (1979) (พระราชบัญญัติคุ้มครองผู้บริโภค พ.ศ. 2522), which has been amended on multiple occasions and remains the central law applicable to advertising and marketing activities. Beyond this foundational statute, a series of sector-specific laws regulate advertising of food, drugs, cosmetics, medical devices, alcohol, and tobacco — each with its own approval procedures and penalty provisions. E-commerce activities are further governed by the Direct Sales and Direct Marketing Act and OCPB notifications applicable to distance selling.
This guide is intended for marketing professionals, business owners, and legal practitioners who need a practical overview of the consumer protection obligations that apply to marketing and advertising activities in Thailand. The guide covers the five consumer rights, four categories of illegal advertising, penalty schedules, e-commerce rules, controlled product categories, and influencer disclosure requirements.
The Office of the Consumer Protection Board (OCPB or "สคบ." — สำนักงานคณะกรรมการคุ้มครองผู้บริโภค) is the primary enforcement authority for general consumer protection under the Consumer Protection Act B.E. 2522 (1979). The Thai Food and Drug Administration (Thai FDA or "อย." — สำนักงานคณะกรรมการอาหารและยา) regulates advertising of food, drugs, cosmetics, and medical devices. The Department of Business Development (DBD) handles unregistered online retailers. Consumers can also bring direct claims in the Consumer Protection Court without paying court filing fees.
1. The Five Fundamental Consumer Rights Consumer Protection Act B.E. 2522 (1979)
The Consumer Protection Act B.E. 2522 (1979) establishes five fundamental rights that every consumer in Thailand is entitled to exercise when purchasing goods or services from any business operator. These rights create corresponding obligations for marketers, advertisers, and sellers — obligation to inform accurately, to allow free choice, to ensure product safety, to offer fair contractual terms, and to provide an accessible complaints mechanism.
Right to Receive Information
Consumers are entitled to receive accurate, sufficient, and non-misleading information about the quality, characteristics, price, and conditions of goods and services before making a purchase decision. Advertising that provides false or incomplete information that influences consumer decision-making violates this right.
Right to Freedom of Choice
Consumers have the right to freely choose among available goods and services without being subjected to coercive sales tactics, undue pressure, or high-pressure marketing techniques. Practices such as deceptive urgency tactics, fake countdown timers, and artificial scarcity messaging may constitute violations of this right.
Right to Safety
Consumers have the right to use goods and services without risk of physical harm arising from defective products, inadequate safety warnings, or misleading instructions. Advertisers who make safety claims that are not substantiated by evidence may also violate this right in addition to the prohibition on false advertising.
Right to Fairness in Contracts
Consumers are entitled to enter into contracts on fair and equitable terms. Contracts that impose unreasonably one-sided terms, bury material conditions in fine print, or contain unfair clauses may be deemed unenforceable under the Unfair Contract Terms Act and the Consumer Protection Act B.E. 2522 (1979). Online terms and conditions are subject to this requirement.
Right to Have Complaints Considered and to Receive Compensation
Consumers have the right to lodge complaints with regulatory authorities and to receive consideration of those complaints, including compensation for proven damages. Under the Consumer Case Procedure Act B.E. 2551 (2008), consumers may file lawsuits in the Consumer Protection Court without paying court fees, with the burden shifting to the defendant business operator to prove the product or advertising claim was not defective or false.
2. Advertising Law — Four Categories of Illegal Advertising Prohibited Advertising Practices and Criminal Penalties
Thai law prohibits four broad categories of advertising practices. Violations can lead to criminal prosecution, regulatory orders to cease and withdraw advertising, mandatory corrective advertising campaigns, and civil liability for consumer damages.
False Advertising
Advertising that contains statements or representations that do not correspond to objective facts. Examples include: claiming "certified by doctors" when no such certification exists; displaying fake test results or endorsements; fabricating customer reviews; displaying false "before and after" imagery; and stating that a product has received certifications or awards it has not received. False advertising violates the Consumer Protection Act B.E. 2522 (1979) and may also constitute criminal fraud under the Criminal Code.
Exaggerated Claims
Advertising that overstates the efficacy, benefit, or quality of a product beyond what can be scientifically substantiated. Classic examples include: "lose 10 kg in 1 week," "100% guaranteed cure," "skin visibly younger in 3 days," or "scientifically proven to eliminate all bacteria." In sectors regulated by the Thai FDA (food, drugs, cosmetics, medical devices), claims that go beyond those approved in the product's registration are illegal regardless of whether they are technically true.
Unfair Advertising
Advertising that contains hidden conditions, undisclosed limitations, deceptive pricing, or terms that create a false impression in the consumer's mind about the actual terms of purchase. Examples include: advertising a price that is only available under narrow conditions not prominently disclosed; running "free gift" promotions where the gift requires a purchase of a certain amount; and advertising subscription services without clearly disclosing the auto-renewal terms and cancellation conditions.
Unauthorized Advertising of Controlled Products
Advertising food, drugs, cosmetics, medical devices, or other Thai FDA-regulated products without obtaining prior approval from the Thai FDA. Even if all claims in the advertisement are truthful and evidence-based, advertising these products without regulatory pre-approval is a strict liability offense under the relevant sector-specific acts. See Section 4 for the full breakdown of controlled product categories.
2.1 Penalty Schedule
The following table summarizes the criminal penalties applicable to advertising law violations in Thailand. These penalties apply to the business operator and, in the case of corporate entities, may also extend to the directors and executives who approved or authorized the advertising:
| Offense | Imprisonment | Fine | Risk Level |
|---|---|---|---|
| False / deceptive advertising (general) | Up to 6 months | Up to THB 50,000 | MEDIUM |
| Unauthorized food advertising (without Thai FDA approval) | — | Up to THB 500,000 | HIGH |
| Unauthorized drug advertising (without Thai FDA approval) | Up to 1 year | Up to THB 100,000 | HIGH |
| Exaggerated / curative claims in cosmetics advertising | Up to 2 years | Up to THB 200,000 | HIGH |
| Non-compliance with OCPB enforcement order | Up to 1 year | Up to THB 100,000 | HIGH |
Beyond criminal penalties, the OCPB has authority to issue orders requiring business operators to: (1) immediately cease the offending advertising across all channels; (2) publish corrective advertising at their own expense for a period determined by the OCPB; and (3) refund all consumers affected by the false advertising. Failure to comply with OCPB orders is itself a separate criminal offense. For repeat offenders, the OCPB may revoke business licenses and refer cases to the Consumer Protection Court for civil remedies including class action damages.
3. Consumer Protection in E-Commerce Distance Selling Rules, Cooling-Off Period, and Online Retailer Obligations
E-commerce and distance selling in Thailand are regulated primarily by the Direct Sales and Direct Marketing Act (พระราชบัญญัติขายตรงและตลาดแบบตรง) and OCPB notifications governing electronic commerce. These rules apply to all online retailers operating in or directing sales to consumers in Thailand, including foreign platforms accessible to Thai consumers.
3.1 Cooling-Off Period — Right of Withdrawal
Thai law grants consumers an unconditional right to cancel and return purchases made through distance selling channels within 7 days of receipt of the goods, without being required to give any reason. Distance selling covers all forms of remote purchasing including: online stores, social commerce (Facebook, Instagram, TikTok, LINE), telephone sales, and TV shopping. Upon cancellation, the seller must refund the full purchase price within 15 days.
3.2 Exceptions to the Cooling-Off Period
The 7-day cooling-off right does not apply to the following categories of goods and services:
- Custom-made products: Goods that were produced according to the individual consumer's specific instructions and cannot be resold to another buyer.
- Perishable goods: Food items, fresh produce, or other goods with a short shelf life where return is not commercially practicable.
- Digital content already accessed: Software, streaming content, downloadable files, or other digital products that the consumer has already downloaded, opened, or activated at the time of the cancellation request.
- Services that have been fully performed: Where the service has been completely rendered during the cooling-off period with the consumer's express prior agreement.
3.3 Mandatory Disclosures for Online Retailers
All online retailers selling to consumers in Thailand are required to clearly display the following information on their website or selling platform before the consumer makes a purchase:
- Seller identity information: Full legal name (for individuals or registered entities), registered address, telephone number, and email address. For registered companies, the commercial registration number (เลขทะเบียนพาณิชย์) must be displayed.
- Product information: Detailed description of the product or service, including material specifications, dimensions, quantities, and any known limitations. Price must be displayed inclusive of VAT, and any additional charges (shipping, handling, import duties) must be clearly disclosed before checkout.
- Return and refund policy: The conditions for returns and exchanges, the time period during which returns will be accepted (including the statutory 7-day cooling-off right), the refund method, and the process for initiating a return must be published in a clearly accessible location.
- Personal data protection policy: Sellers must have and publish a Privacy Policy that complies with the Personal Data Protection Act B.E. 2562 (2019) (PDPA), explaining what personal data is collected, the legal basis for processing, the purposes of use, and the consumer's rights under the PDPA.
Marketplace platforms (Shopee, Lazada, LINE Shopping, Facebook Marketplace) are subject to increasing regulatory scrutiny regarding the conduct of third-party sellers on their platforms. Both the platform and the individual seller may face liability under the Consumer Protection Act B.E. 2522 (1979) and the Electronic Transactions Act if the platform fails to remove listings that are clearly illegal or takes no action after being notified of consumer protection violations.
4. FDA-Controlled Products Requiring Pre-Approval Products That Cannot Be Advertised Without Thai FDA Authorization
A distinct and particularly high-risk area of advertising law in Thailand is the requirement to obtain pre-approval from the Thai Food and Drug Administration (สำนักงานคณะกรรมการอาหารและยา — Thai FDA) before advertising certain regulated product categories. This requirement applies regardless of whether the claims made in the advertisement are accurate. The pre-approval requirement is a strict liability obligation — there is no defense of "good faith" or "honest mistake" available where pre-approval was simply not obtained.
Food Act B.E. 2522 (1979) — พระราชบัญญัติอาหาร พ.ศ. 2522
All advertising of food products — including dietary supplements, health foods, functional beverages, and infant formula — requires prior approval from the Thai FDA. Advertisements must not claim that the food product can treat, cure, or prevent any disease or medical condition. Claims such as "boosts immunity," "fights cancer cells," or "lowers blood pressure" are prohibited even if scientifically supported, because medical benefit claims are reserved for drug products that have undergone the drug approval process. Violation: fine up to THB 500,000.
Drug Act B.E. 2510 (1967) — พระราชบัญญัติยา พ.ศ. 2510
Advertising of pharmaceutical products requires prior Thai FDA approval for each specific advertisement. Advertising of dangerous drugs and specially controlled drugs (which require a prescription) directly to the general public is prohibited entirely. Only over-the-counter drugs may be advertised to the public, and only within the scope of the approved claims. Comparative advertising against competitor drugs is subject to strict rules. Violation: up to 1 year imprisonment and/or fine up to THB 100,000.
Cosmetics Act B.E. 2558 (2015) — พระราชบัญญัติเครื่องสำอาง พ.ศ. 2558
Cosmetics advertising does not require the same formal pre-approval process as food and drugs, but the Cosmetics Act B.E. 2558 (2015) strictly prohibits claims that attribute drug-like therapeutic or curative properties to cosmetic products. Claims that are prohibited include: "whitens skin permanently," "removes wrinkles permanently," "treats acne," "repairs damaged hair cells," and "clinical strength anti-aging." The test is whether the claim implies physiological change beyond surface appearance. Violation: up to 2 years imprisonment and/or fine up to THB 200,000.
Medical Devices Act B.E. 2551 (2008) — พระราชบัญญัติเครื่องมือแพทย์ พ.ศ. 2551
All advertising of products classified as medical devices under the Medical Devices Act B.E. 2551 (2008) requires prior Thai FDA approval. Medical devices include a broad range of products — from blood pressure monitors and glucose meters to surgical equipment and certain cosmetic devices. Marketing devices that falsely claim FDA registration when they are not registered is a serious criminal offense. The Thai FDA actively monitors e-commerce platforms and social media for unauthorized medical device advertising.
Alcoholic Beverage Control Act / Tobacco Products Control Act
Advertising of alcohol and tobacco products is subject to comprehensive restrictions that effectively prohibit most forms of direct advertising to consumers in Thailand. The Alcoholic Beverage Control Act B.E. 2551 (2008) prohibits advertising that promotes drinking, displays the brand of alcoholic beverages, or associates alcohol with good health, success, or positive social outcomes. Tobacco advertising is prohibited under the Tobacco Products Control Act B.E. 2560 (2017). Both acts apply to digital and social media advertising as well as traditional media.
Thai consumer protection authorities actively monitor digital advertising by foreign companies directed at Thai consumers. A foreign company running social media or search advertising in Thailand for a regulated product without Thai FDA pre-approval is subject to enforcement action under Thai law. Platform-level targeting of Thai consumers (language, location, currency) is typically sufficient to establish jurisdiction regardless of where the advertising company is incorporated.
5. Influencer and Sponsored Content Disclosure Rules Obligations for Influencers, KOLs, and Brand Ambassadors
The growth of influencer marketing and Key Opinion Leader (KOL) campaigns in Thailand has brought sponsored content under increasing regulatory and public scrutiny. Under Thai consumer protection law, content that is paid for or otherwise compensated — regardless of whether it takes the form of a product review, comparison video, unboxing, or editorial commentary — constitutes advertising and must comply with all applicable advertising regulations, including the prohibition on false and exaggerated claims.
5.1 Mandatory Disclosure of Commercial Relationships
Influencers, content creators, and brand ambassadors who receive payment, product samples, gifts, travel, or any other form of compensation in exchange for posting content about a product or service are required to disclose that the content is commercial advertising. Failure to disclose constitutes deceptive advertising under the Consumer Protection Act B.E. 2522 (1979) because it creates a false impression in the audience's mind that the content represents an independent, uncompensated opinion.
- Required disclosure language: Use clearly visible hashtags such as #Ad, #Sponsored, #Advertisement, #Partnership, or the Thai equivalents #โฆษณา, #Sponsored, #สปอนเซอร์. The disclosure must appear at the beginning of the post, video description, or caption — not buried among other hashtags at the end.
- Video content: For video content, the sponsored disclosure must appear both at the beginning of the video and in the video description. A disclosure only in the description without any on-screen notification is generally considered insufficient.
- Prohibition on presenting paid content as personal opinion: Phrases such as "I genuinely love this product" or "I use this every day" are acceptable in sponsored content only if literally true and when the commercial relationship is disclosed. Stating or implying that the recommendation is independent when it is compensated is a violation regardless of whether the influencer personally likes the product.
- Fake reviews (Fake Review): Posting fabricated positive reviews, purchasing fake reviews, or coordinating a review campaign that does not reflect genuine consumer experience constitutes false advertising under the Consumer Protection Act B.E. 2522 (1979) and may additionally expose the operator to civil liability under the Civil and Commercial Code.
5.2 Brand Responsibility for Influencer Campaigns
Under Thai consumer protection law, the advertising obligation rests with the business operator (the brand or advertiser) as well as the media owner (in this context, the influencer's channel). A brand that briefs an influencer to make false or exaggerated claims — even if the influencer executes the campaign — remains primarily liable under the Consumer Protection Act B.E. 2522 (1979). Brands should include contractual requirements for influencer disclosure compliance in all influencer engagement agreements, and should implement a review process for content before it is published to verify that no prohibited claims are made.
The OCPB has been increasing enforcement against influencer campaigns for health and wellness products, cosmetics, and dietary supplements, particularly where influencers make curative or exaggerated efficacy claims without disclosing that the content is sponsored and without having Thai FDA pre-approval for the specific advertising claims. Several high-profile enforcement actions have resulted in brands being required to remove content across all platforms and publish corrective statements. This trend is expected to accelerate as the OCPB develops more sophisticated digital monitoring capabilities.
6. Consumer Complaint Channels How Consumers Can Report Violations and Seek Redress
Thai law provides consumers with multiple accessible channels for reporting consumer protection violations and obtaining redress. Understanding these channels helps marketers and businesses assess the practical enforcement risk associated with non-compliance.
- Office of the Consumer Protection Board (OCPB) — สคบ.: The primary consumer protection regulator. Hotline 1166. Consumers can file complaints online at ocpb.go.th. The OCPB has authority to investigate, issue cease orders, and refer criminal cases to prosecutors. Response time has improved significantly with the OCPB's digital complaint portal.
- Thai Food and Drug Administration (Thai FDA) — อย.: Regulates all advertising of food, drugs, cosmetics, and medical devices. Hotline 1556. The Thai FDA maintains an active digital monitoring team that reviews social media and e-commerce platforms for unauthorized or non-compliant advertising of regulated products.
- Department of Business Development (DBD) — กรมพัฒนาธุรกิจการค้า: Handles complaints against online retailers operating without proper commercial registration. The DBD coordinates with e-commerce platforms to remove listings from unregistered operators.
- Consumer Protection Court — ศาลคุ้มครองผู้บริโภค: Consumers may file civil suits for damages in the Consumer Protection Court (a division of the Courts of Justice) without paying court filing fees. Under the Consumer Case Procedure Act B.E. 2551 (2008), the burden of proof in consumer protection cases is reversed — the defendant business operator must prove that the product or advertising claim was not defective or false, rather than the consumer proving that it was.
- Electronic Transactions Development Agency (ETDA): For e-commerce disputes involving digital transactions and electronic contracts. ETDA coordinates complaint handling with online platform operators.
7. Practical Checklist for Marketers Six Steps to Consumer Protection Compliance
The following six-step checklist summarizes the minimum due diligence that marketing professionals should complete before launching any advertising campaign in Thailand:
Verify Every Claim Before Publishing
Every factual claim in an advertisement must be supported by objective, verifiable evidence before publication. "Doctor-certified," "clinically proven," "award-winning," and similar credentialing claims must be backed by actual documentation. If the evidence does not exist at the time of publication, the claim must be removed from the advertisement. Obtaining pre-publication sign-off from legal counsel is strongly recommended for health, wellness, and performance claims.
Obtain Thai FDA Pre-Approval for Controlled Products
If your product is classified as food, drug, cosmetic, or medical device under Thai law, obtain Thai FDA pre-approval for each advertisement before publication on any channel including social media, search, display advertising, and outdoor media. Keep approval documentation on file for a minimum of 5 years. Even if an advertising agency or media partner manages the submission process, the legal responsibility for compliance remains with the business operator.
Disclose All Material Conditions Prominently
Any condition, limitation, or additional cost that would influence a consumer's decision to purchase must be disclosed clearly and prominently — not buried in small-print terms and conditions. Price promotions must disclose the full qualifying conditions. "Limited time offer" claims must specify the actual end date. "While stocks last" messaging must not be used if inventory is not actually limited. OCPB enforcement consistently targets promotions that advertise attractive headline offers with material restrictions not prominently disclosed.
Require Disclosure for All Sponsored Content
Include a mandatory disclosure requirement in all influencer and KOL engagement contracts. Specify the exact disclosure language (e.g., "#Ad" or "#โฆษณา"), the placement requirement (beginning of caption, on-screen in video), and the content review process. Establish an internal compliance review for all sponsored content before it goes live to verify that no prohibited claims are present and that disclosures are compliant. Document the review process for every campaign.
Publish a Clear and Accessible Return Policy for Online Sales
Online retailers must publish a return and refund policy that at minimum confirms and explains the statutory 7-day cooling-off right for distance purchases. The policy must be accessible from the product page and checkout page — not only in a buried FAQ section. The policy must clearly explain the process for initiating a return, the refund method and timeline (15 days from cancellation), and any applicable exceptions. Policies that attempt to restrict the statutory cooling-off right are void and expose the operator to OCPB enforcement action.
Consult Legal Counsel Before Large-Scale Campaigns
For product launch campaigns, campaigns involving health or efficacy claims, campaigns using celebrity or influencer endorsements, and any marketing campaign with a budget above THB 500,000, obtain a legal review from a Thai consumer protection lawyer before launch. A pre-campaign legal review typically costs a fraction of the potential fines, corrective advertising costs, and reputational damage associated with a consumer protection enforcement action. The cost of compliance is always lower than the cost of remediation.
References
- Consumer Protection Act B.E. 2522 (1979) as amended (พระราชบัญญัติคุ้มครองผู้บริโภค พ.ศ. 2522 และที่แก้ไขเพิ่มเติม)
- Food Act B.E. 2522 (1979) (พระราชบัญญัติอาหาร พ.ศ. 2522)
- Drug Act B.E. 2510 (1967) (พระราชบัญญัติยา พ.ศ. 2510)
- Cosmetics Act B.E. 2558 (2015) (พระราชบัญญัติเครื่องสำอาง พ.ศ. 2558)
- Medical Devices Act B.E. 2551 (2008) (พระราชบัญญัติเครื่องมือแพทย์ พ.ศ. 2551)
- Alcoholic Beverage Control Act B.E. 2551 (2008) (พระราชบัญญัติควบคุมเครื่องดื่มแอลกอฮอล์ พ.ศ. 2551)
- Tobacco Products Control Act B.E. 2560 (2017) (พระราชบัญญัติควบคุมผลิตภัณฑ์ยาสูบ พ.ศ. 2560)
- Consumer Case Procedure Act B.E. 2551 (2008) (พระราชบัญญัติวิธีพิจารณาคดีผู้บริโภค พ.ศ. 2551)
- Personal Data Protection Act B.E. 2562 (2019) (พระราชบัญญัติคุ้มครองข้อมูลส่วนบุคคล พ.ศ. 2562)
- Office of the Consumer Protection Board (OCPB) — www.ocpb.go.th
- Thai Food and Drug Administration (Thai FDA) — www.fda.moph.go.th
- OCS Legal Database (Office of the Council of State) — www.ocs.go.th/searchlaw-law
Legal Disclaimer
English: This article is prepared solely for academic and general informational purposes. It does not constitute legal advice for any specific matter or marketing campaign. Consumer protection laws and Thai FDA regulations are subject to periodic revision and regulatory reinterpretation; readers should verify current requirements directly with the relevant regulatory authorities (OCPB, Thai FDA) before relying on the information in this article. The author, Thundthornthep Yamoutai, Ph.D., and Legal Advance Solution Co., Ltd. disclaim all liability for any loss or damage arising from reliance on the contents of this article without professional consultation.
© 2026 Thundthornthep Yamoutai, Ph.D. — Legal Advance Solution Co., Ltd. (LAS) — All Rights Reserved.