Book 3 — Specific Contracts

Section 821 — Ostensible (apparent) agency

Statutory text (Thai original)

บุคคลผู้ใดเชิดบุคคลอีกคนหนึ่งออกแสดงเป็นตัวแทนของตนก็ดี รู้แล้วยอมให้บุคคลอีกคนหนึ่งเชิดตัวเขาเองออกแสดงเป็นตัวแทนของตนก็ดี ท่านว่าบุคคลผู้นั้นจะต้องรับผิดต่อบุคคลภายนอกผู้สุจริตเสมือนว่าบุคคลอีกคนหนึ่งนั้นเป็นตัวแทนของตน

Verbatim from the Royal Gazette / Office of the Council of State

English translation

A person who holds out another person as his agent or knowingly allows another person to hold himself out as his agent, is liable to third persons in good faith in the same way as such person was his agent.

This English translation is provided for reference only and has not yet been firm-verified. Always rely on the Thai original.

Firm annotation

Section 821 is part of Book 3 (Specific Contracts) of the Thai Civil and Commercial Code. This entry is awaiting firm-authored commentary; the statutory text above is verbatim from the Office of the Council of State (OCS Krisdika) Thai source, with the English translation from the FAO/UN FAOLEX repository. Always rely on the Thai original for legal proceedings.

Core section

Why this matters in practice

For lawyers: to trigger Section 821 three conditions must be met — (1) a holding-out by the alleged principal, (2) a good-faith third party who relied on it, and (3) the third party's belief that they were dealing with the principal. For laypersons: if a company lets someone act as if they represent it, the company is bound even if no formal authority was granted.

Legislative history

Part of the original Civil and Commercial Code codification; no major subsequent amendment.

  • apparent agency
  • ostensible agent
  • holding out
  • good faith third party
  • principal liability

Supreme Court decisions interpreting this section

  1. Supreme Court Judgment No. 11188/2558 (2015) ★ Landmark

    Apparent agency requires actual reliance by a good-faith third party who genuinely believed the agent was acting for the disclosed principal.

    Apparent agency under Section 821 requires not only that the alleged principal hold out the agent, but also that the third party must in fact have been misled into believing they were dealing with the principal. If the third party knew the true situation, Section 821 does not apply.

    Read the full decision (deka.in.th)

  2. Supreme Court Judgment No. 5683/2552 (2009)

    Repeated acquiescence in another person's acts as if they were the agent constitutes a holding-out that binds the alleged principal under Section 821.

    Where the defendant allowed a co-defendant to conduct purchases of fertiliser in the defendant's name on five prior occasions without objection, the defendant was found to have held out the co-defendant as apparent agent; the defendant was therefore bound by the co-defendant's sixth purchase.

    Read the full decision (deka.in.th)

Curated decisions with case numbers verified against the Supreme Court database. English renderings are the firm's editorial translation for study.

Cited in 119 Supreme Court decisions (1950 to 2025)

Selected citing decisions

  • Decision 114/2565 (2022)
  • Decision 355/2563 (2020)
  • Decision 2581/2561 (2018)
  • Decision 3444/2559 (2016)
  • Decision 14778/2558 (2015)
  • Decision 11188/2558 (2015)
  • Decision 10850/2558 (2015)
  • Decision 4115/2556 (2013)

This list is selected automatically, weighted towards judgments that turn on this section rather than ones that merely recite it when passing sentence. It has not yet been reviewed by the firm.

Most often cited alongside

Sections that appear in the same judgments as this one most often. The figure is the number of decisions.

Counted across the firm's corpus of 83,652 Supreme Court decisions, 1921 to 2026. The count is complete; the stated year range trims rare outliers so it describes where the citations actually sit. These figures are computed by us and are not official court statistics.

Frequently asked questions

Can a company be bound by a person it never formally appointed as agent?

Yes, under Section 821. If the company's conduct led a good-faith third party reasonably to believe that the person was acting as the company's agent, the company is liable to that third party as if a formal agency existed. The third party must have actually relied on that belief.

Related guides on ThaiLawOnline

Cite this section

  • Plain citation Civil and Commercial Code, s. 821 (Thailand)
  • Academic citation Civil and Commercial Code (Thailand), s. 821. ThaiLawOnline, https://www.thailawonline.com/thai-civil-code/section-821/ (accessed 8 August 2026).
  • Thai citation ป.พ.พ. มาตรา 821
  • Permalink https://www.thailawonline.com/thai-civil-code/section-821/
  • Embed on your site <blockquote cite="https://www.thailawonline.com/thai-civil-code/section-821/"><p>A person who holds out another person as his agent or knowingly allows another person to hold himself out as his agent, is liable to third persons in good faith in the same way as such person was his agent.</p><footer>Civil and Commercial Code, s. 821 (Thailand) — <a href="https://www.thailawonline.com/thai-civil-code/section-821/">ThaiLawOnline</a></footer></blockquote>

The Thai text is authoritative. The English is an unofficial translation by ThaiLawOnline, free to reuse with attribution.

This is educational reference, not legal advice. Consult a qualified Thai lawyer before relying on any provision.

Scroll to Top
WhatsApp LINE Call Book