Book 1 — General Principles

Section 186

Statutory text (Thai original)

ถ้าความสำเร็จแห่งเงื่อนไขจะเป็นทางให้คู่กรณีฝ่ายใดเสียเปรียบ และคู่กรณีฝ่ายนั้นกระทำการโดยไม่สุจริตจนเป็นเหตุให้เงื่อนไขนั้นไม่สำเร็จให้ถือว่าเงื่อนไขนั้นสำเร็จแล้วถ้าความสำเร็จแห่งเงื่อนไขจะเป็นทางให้คู่กรณีฝ่ายใดได้เปรียบ และคู่กรณีฝ่ายนั้นกระทำการโดยไม่สุจริตจนเป็นเหตุให้เงื่อนไขนั้นสำเร็จ ให้ถือว่าเงื่อนไขนั้นมิได้สำเร็จเลย

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

English translation

If the fulfillment of a condition is prevented not in good faith by the party to whose disadvantage it would operate, the condition is deemed to have been fulfilled. If the fulfillment of a condition is brought about in bad faith by the party to whose advantage it would operate, the condition is deemed not to have been fulfilled.

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

Firm annotation

Section 186 is part of Book 1 (General Principles) 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.

Cited in 5 Supreme Court decisions (1963 to 2016)

Selected citing decisions

  • Decision 3778/2531 (1988)
  • Decision 3712/2524 (1981)
  • Decision 988/2506 (1963)
  • Decision 9367/2559 (2016)
  • Decision 391/2519 (1976)

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.

Counted across the firm's corpus of 83,652 Supreme Court decisions, 1921 to 2026. These figures are computed by us and are not official court statistics.

Related guides on ThaiLawOnline

Cite this section

  • Plain citation Civil and Commercial Code, s. 186 (Thailand)
  • Academic citation Civil and Commercial Code (Thailand), s. 186. ThaiLawOnline, https://www.thailawonline.com/thai-civil-code/section-186/ (accessed 8 August 2026).
  • Thai citation ป.พ.พ. มาตรา 186
  • Permalink https://www.thailawonline.com/thai-civil-code/section-186/
  • Embed on your site <blockquote cite="https://www.thailawonline.com/thai-civil-code/section-186/"><p>If the fulfillment of a condition is prevented not in good faith by the party to whose disadvantage it would operate, the condition is deemed to have been fulfilled. If the fulfillment of a condition is brought about in bad faith by the party to…</p><footer>Civil and Commercial Code, s. 186 (Thailand) — <a href="https://www.thailawonline.com/thai-civil-code/section-186/">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.

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