Okla. Stat. » Title 15 — CONTRACTS
Oklahoma Statutes

Okla. Stat. tit. 15, § 64 (2026)

Mistake of law defined

✓ current as of July 2026
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Mistakes of law constitute a mistake within the meaning of this article only when it arises from: 1. A misapprehension of the law by all parties, all supposing that they knew and understood it, and all making substantially the same mistake as to the law; or, 2. A misapprehension of the law by one party, of which the others are aware at the time of contracting, but which they do not rectify. R.L.1910, § 909.

Notes of Decisions
Cited in 2 cases (1 in the last 5 years), 1991–2022 · leading case: French Energy, Inc. v. Alexander, 818 P.2d 1234 (Okla. 1991).
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French Energy, Inc. v. Alexander, 818 P.2d 1234 (Okla. 1991). “) The provisions of 15 O.S.1981 § 64 are: "Mistakes of law constitute a mistake within the meaning of this article only when it arises from: 1.”
Mecom v. Morris (N.D. Okla. 2022). “” Okla. Stat. tit. 15, § 64 . consistently held “equity will grant relief where parties have made a mistake as to the legal meaning and operation of the terms of language employed in a writing.”
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