Book 2: Obligations

Section 321: Discharge by substituted performance (datio in solutum)

Statutory text (Thai original)

ถ้าเจ้าหนี้ยอมรับการชำระหนี้อย่างอื่นแทนการชำระหนี้ที่ได้ตกลงกันไว้ ท่านว่าหนี้นั้นก็เป็นอันระงับสิ้นไป ถ้าเพื่อที่จะทำให้พอแก่ใจเจ้าหนี้นั้น ลูกหนี้รับภาระเป็นหนี้อย่างใดอย่างหนึ่งขึ้นใหม่ต่อเจ้าหนี้ไซร้ เมื่อกรณีเป็นที่สงสัย ท่านมิให้สันนิษฐานว่าลูกหนี้ได้ก่อหนี้นั้นขึ้นแทนการชำระหนี้ ถ้าชำระหนี้ด้วยออก-ด้วยโอน-หรือด้วยสลักหลังตั๋วเงินหรือประทวนสินค้า ท่านว่าหนี้นั้นจะระงับสิ้นไปต่อเมื่อตั๋วเงินหรือประทวนสินค้านั้นได้ใช้เงินแล้ว

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

English translation

An obligation is extinguished if the creditor accepts in lieu of performance another performance than agreed upon. If the debtor, for the purpose of satisfying the creditor, assumes a new obligation towards him, is not to be presumed, in case of doubt, that he assumes the obligation in lieu of performance. If performance is made by making, transferring, or endorsing a bull or warrant, the obligation is extinguished only if such bill or warrant is paid.

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

Firm annotation

Section 321 is part of Book 2 (Obligations) 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.

High importance

Why this matters in practice

For lawyers: when a debtor transfers property instead of paying cash, confirm in writing that this is accepted as full satisfaction; ambiguity defaults to the new transfer being security only. For laypersons: handing over goods instead of money discharges a debt only if the creditor expressly agrees it is in full settlement.

Legislative history

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

  • datio in solutum
  • substituted performance
  • novation
  • obligation extinguished
  • bill of exchange

Supreme Court decisions interpreting this section

  1. Supreme Court Judgment No. 13678/2558 (2015)

    Section 321 paragraph one, the general rule, provides that where the creditor accepts a performance other than the one agreed, the obligation is extinguished. Section 656 paragraph two, the particular rule for loans, provides that where a lender accepts goods or other property in place of the money lent, the obligation so discharged is reckoned at the market price of that property at the time and place of delivery. Both turn on the creditor or lender having agreed. Accepting goods or other property instead of the money lent is the lender's right alone, to give or to withhold, so a term in a loan agreement that flatly forbids substituted performance is valid and is not void. The section requires the creditor's acceptance; it imposes no requirement that the acceptance be express as distinct from given.

    The question was whether an obligation under a loan had been extinguished by a performance other than payment of the money lent. The Supreme Court read section 321 paragraph one together with section 656 paragraph two and held that the essential element of both is that the creditor, or the lender, has agreed. Whether to accept goods or other property in place of the money lent is a right belonging to the lender alone, to give or to withhold, and a clause in the loan agreement prohibiting substituted performance is valid and not void. The Court did not require the acceptance to be express as opposed to given.

    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 92 Supreme Court decisions (1943 to 2024)

Selected citing decisions

  • Decision 6964/2567 (2024)
  • Decision 2960/2566 (2023)
  • Decision 3096/2565 (2022)
  • Decision 13678/2558 (2015)
  • Decision 18801/2557 (2014)
  • Decision 10227/2551 (2008)
  • Decision 6823/2551 (2008)
  • Decision 4895/2551 (2008)

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. How we count these, and what we measured

Cite this section

  • Plain citation Civil and Commercial Code, s. 321 (Thailand)
  • Academic citation Civil and Commercial Code (Thailand), s. 321. ThaiLawOnline, https://www.thailawonline.com/thai-civil-code/section-321/ (accessed 28 August 2026).
  • Thai citation ป.พ.พ. มาตรา 321
  • Permalink https://www.thailawonline.com/thai-civil-code/section-321/
  • Embed on your site <blockquote cite="https://www.thailawonline.com/thai-civil-code/section-321/"><p>An obligation is extinguished if the creditor accepts in lieu of performance another performance than agreed upon. If the debtor, for the purpose of satisfying the creditor, assumes a new obligation towards him, is not to be presumed, in case of doubt, that he assumes…</p><footer>Civil and Commercial Code, s. 321 (Thailand): <a href="https://www.thailawonline.com/thai-civil-code/section-321/">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