OK BAR Cheat Sheet 2026

The 30 highest-yield OK BAR facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. An agency head who personally investigated a case also serves as the final decision-maker in the adjudication. The respondent's best due process objection is: → Impermissible combination of investigative and adjudicative functions creating bias
2. After a contract for the sale of goods is formed, a new regulation makes delivery illegal. The seller's duty is: → Discharged by supervening illegality
3. Under Oklahoma's modified comparative negligence rule, a plaintiff is barred from recovery when their own fault is: → Greater than 50% of the combined negligence
4. An MEE essay tests a subject also covered on the MBE, such as evidence. What law should the examinee apply absent contrary instructions? → Generally applicable majority principles, such as the Federal Rules of Evidence
5. An Oklahoma court is dividing marital property in a divorce. What standard governs the division? → A just and reasonable (equitable) division, which need not be equal
6. H and W own Oklahoma property as joint tenants. H dies with a will leaving all his property to his brother. Who owns the property? → W alone
7. The Erie doctrine requires federal courts sitting in diversity to apply: → State substantive law and federal procedural law
8. In a construction contract silent on order of performance, which party must perform first? → The builder must substantially complete the work before payment is due
9. Which factor is an Oklahoma court prohibited from using as the sole basis for denying custody to a parent? → The parent's disability, standing alone
10. What is a quitclaim deed? → A deed that transfers whatever interest the grantor may have without warranties of title
11. A buyer under an installment contract receives one shipment with minor defects that can be cured. Under the UCC, the buyer may reject that installment only if: → The nonconformity substantially impairs the value of that installment and cannot be cured
12. A testator writes an entire will in her own handwriting, dates it, and signs it, but no witnesses attest. Under Oklahoma law, the will is: → Valid as a holographic will
13. In an Oklahoma civil jury trial in district court, how many of the twelve jurors must agree to render a verdict in a civil case? → At least nine jurors must agree
14. Under the Oklahoma Revised Uniform Partnership Act, a partner who wrongfully dissociates from a partnership is: → Liable to the partnership for damages caused by the wrongful dissociation
15. A personal representative in an Oklahoma probate breaches her fiduciary duty by: → Using estate funds to pay her personal debts
16. Which entity publishes Oklahoma's permanent administrative rules in codified form? → The Office of Administrative Rules, in the Oklahoma Administrative Code
17. Under traditional conflict-of-laws rules, 'domicile' for choice-of-law purposes is best defined as: → The state where a person is physically present with the intent to remain indefinitely
18. In an Oklahoma individual proceeding, hearsay evidence is: → Admissible if it is the type of evidence reasonably prudent persons rely on
19. Under Oklahoma discovery rules, a party who receives an interrogatory must respond within how many days absent a court order or stipulation? → 30 days
20. Which best describes the effect of a final agency order that is not appealed within the statutory period? → It becomes final and generally binding on the parties
21. In Oklahoma state courts, venue is generally proper in the county where: → The cause of action arose or where the defendant resides
22. A man is married to a woman when she gives birth. Under Oklahoma's Uniform Parentage Act, what is his status? → He is a presumed father of the child
23. A party has reasonable grounds for insecurity about the other side's performance under a UCC sale. The proper step is to: → Demand adequate assurance in writing and suspend performance if justified
24. What are the grounds for contesting a will? → Lack of testamentary capacity, undue influence, fraud, or improper execution
25. Under the First Amendment, which type of speech receives the LEAST constitutional protection? → Obscenity
26. A seller of goods learns the buyer is insolvent while the goods are in transit. Under the UCC, the seller may: → Stop delivery of the goods in transit
27. In Oklahoma, until what point does a parent's child support obligation ordinarily continue for a child who is still in high school? → Until age 20 if the child is regularly attending high school
28. At what age does Oklahoma law create a rebuttable presumption that a child's custodial preference should be considered by the court? → Twelve years old
29. A torts essay describes a plaintiff who was 40% at fault in a jurisdiction applying pure comparative negligence. The plaintiff's $100,000 damages award becomes: → $60,000
30. Under Oklahoma's pleading standards, when a defendant fails to raise a compulsory counterclaim in their answer, what is the consequence? → The claim is waived and barred in future litigation