Compliance · Thailand
SMS Compliance in Thailand
A practical overview of the rules that affect SMS messaging and marketing in Thailand, with a checklist before you launch.
Key Rules for SMS in Thailand
SMS in Thailand is regulated by the National Broadcasting and Telecommunications Commission (NBTC). As part of anti-scam measures, operators require registered sender names and screen bulk messages more strictly than before, so promotional SMS should be sent only with consent.
Several Asian markets require sender ID registration (for example Singapore's SMS Sender ID Registry) and have data protection laws with marketing consent rules, such as Singapore's PDPA and Malaysia's PDPA.
Data Protection
Thailand's Personal Data Protection Act B.E. 2562 (2019), fully enforced since June 2022, requires clear privacy notices and, in most cases, consent for direct marketing.
Keep a record of how each contact was collected, what they agreed to and when, and make it easy for them to withdraw consent.
Practical Checklist
- Collect and record consent (or confirm an existing customer relationship) before sending, with the date and source.
- Use a registered sender ID or number that recipients can recognise as your business.
- Identify your business in every message and keep promotional and service messages separate.
- Give a simple way to opt out of marketing and process opt-outs quickly across all your systems.
- Send in the recipient's local daytime hours and keep frequency reasonable.
Contact data
Format numbers in international E.164 format with the +66 country code, remove duplicates and invalid numbers, and keep consent records linked to each number.
Timing and Language
Thailand follows the Asia/Bangkok time zone (UTC+07:00 in October 2026). The usual working week is Monday to Friday. Schedule SMS campaigns for the recipient's local daytime hours, avoid public holidays and religious observances that matter to your audience, and convert send times from IST before scheduling.
In Bangkok, customers commonly use Thai and English. Messages in the customer's preferred language usually perform better, but check how local-language text affects character counts (for SMS) and template approval (for WhatsApp).
Digital Habits and Channels in Thailand
Thailand has very high smartphone and social media use, and LINE is the main channel for business-to-customer communication through LINE Official Accounts, alongside Facebook and TikTok. SMS remains common for OTPs and delivery updates.
PromptPay QR payments are ubiquitous, and mobile banking apps are used for most transfers. Songkran in April, the 11.11 and 12.12 online sales and the November to February tourism high season shape demand, and Thailand's PDPA governs consent for marketing.
Thailand's economy relies on tourism, automotive manufacturing (the Eastern Seaboard is known as the Detroit of Asia), electronics, rice, rubber and food processing. VAT is 7%, and prices are in baht. Thai consumers use LINE heavily for chatting with businesses, and PromptPay QR payments are accepted almost everywhere. The Personal Data Protection Act of 2019, fully in force since June 2022, requires consent for marketing messages.
Regulators, Registers and Practical Rules in Thailand
Thailand's Personal Data Protection Act (PDPA) has been fully in force since June 2022, supervised by the PDPC, and the NBTC regulates telecoms and has tightened rules on SMS sender names to fight scams. AIS, True and NT are the operators.
Thai operators now block messages with unregistered sender names and links to unknown domains, so register sender names and links in advance. Messages should be in Thai, with English for tourism. LINE is the main messaging app for business accounts.
Thailand's PDPC can impose administrative fines.
In practice, Thai brands rely on LINE official accounts.
General guidance, not legal advice. Check current rules with the regulator or a local adviser before launch.
Advertising Alongside Messaging
Advertising must follow the Consumer Protection Act and platform policies; health, food and especially alcohol advertising face strict rules.
This guide is general information, not legal advice, and reflects our understanding as of October 2026. Rules change, so we check current requirements for Thailand before every launch.
Planning SMS campaigns for Thailand?
We check the rules, set up sender requirements and run compliant campaigns.
SMS in Thailand: FAQs
Do I need consent to send marketing SMS messages in Thailand?
In most cases, yes, or at least an existing customer relationship and a clear opt-out. SMS in Thailand is regulated by the National Broadcasting and Telecommunications Commission (NBTC).
Do I need a registered sender ID for Thailand?
Sender ID rules vary by country and operator. Some countries require pre-registration of alphanumeric sender IDs, others only allow numeric senders. We confirm the current requirement before launch.
Can DND Teams run SMS campaigns to Thailand?
Yes. We are based in Bhopal, India, and run campaigns for international markets remotely, after checking the current rules, sender requirements and coverage for Thailand.
Is this legal advice?
No. This guide is general information to help you plan. Regulations change and their application depends on your business, so take local legal advice for significant campaigns.
Related Guides and Services
Other channels in Thailand
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