Company details, permits and the rules our signs are built to.
Who you are contracting with, the Thai regulations that govern outdoor advertising, and how to raise a complaint.
Last updated 3 September 2026
1. Company information
Thai Prasith Signtech Company Limited is a private limited company registered in Thailand under the Civil and Commercial Code, with its registered office and workshop at 304,324 Wongwian 22 Karakkada Rd. Khwaeng Pom Prap, Khet Pom Prap Sattru Phai, Bangkok 10100. Our company registration number issued by the Department of Business Development and our VAT registration number appear on every quotation, invoice and tax invoice we issue.
2. Permits we handle on your behalf
Most signs in Bangkok need more than one approval. Where your job needs them we prepare and submit:
3. Signs on and over public space
Placement of signs, banners and posters in public space is controlled by the Cleanliness and Orderliness of the Country Act B.E. 2535 (1992) and enforced by the district office, which can order removal and issue fines. We quote only positions that can be permitted, and we tell you at quote stage when a position cannot.
4. Signboard tax
Under the Signboard Tax Act B.E. 2510 (1967) the owner of a sign pays an annual signboard tax to the local authority, calculated on the area of the sign and on whether it carries Thai text, foreign text, or both. We give you the finished dimensions and the language split so your accountant can file the return. Filing and paying the tax remains your responsibility, not ours.
5. Advertising content
False or misleading advertising is prohibited by the Consumer Protection Act B.E. 2522 (1979). Food, cosmetics, medical devices, health services, alcohol and tobacco carry further restrictions under Food and Drug Administration rules and the Alcohol Beverage Control Act B.E. 2551 (2008). Responsibility for advertising content rests with the advertiser, though we will flag an obvious problem before we print rather than after.
6. Safety, engineering and insurance
Rooftop frames and pole structures are built to calculations signed by a licensed engineer where the Engineer Act B.E. 2542 (1999) requires it. We carry public liability cover for installation work, our crews are trained and equipped for work at height, and copies of the relevant certificates are available on request before a job starts.
7. Warranty
Fabrication and workmanship carry a twelve month warranty from handover. LED modules and drivers carry the manufacturer warranty passed through to you. Storm damage, impact, unauthorised alteration and work by others are excluded. The exact terms for your job are written on the handover sheet you sign.
8. Complaints and disputes
Call us first, then put it in writing to support@tpsigntech.com. We acknowledge within two working days and answer within seven. If we cannot resolve it, you may take the matter to the Office of the Consumer Protection Board or to the courts of Bangkok.
Thai Prasith Signtech Company Limited, 304,324 Wongwian 22 Karakkada Rd. Khwaeng Pom Prap, Khet Pom Prap Sattru Phai, Bangkok 10100. Write to support@tpsigntech.com or call +66 84 109 1946, Monday to Saturday.
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