Definition
Frank law (also fraunche ley; libera lex; lex terræ) is an obsolete English legal concept referring to the full benefit and standing of a free person under the common law — specifically, the liberty to be sworn as a witness or to serve as a juror in a court of law. In medieval English law, only a "free and lawful man" (liber et legalis homo) possessed frank law. It was not merely a procedural privilege but a mark of civil status: to hold frank law was to be recognized as a competent legal actor; to lose it was to be cast out of that standing entirely.
The concept operated on two levels:
1. Testimonial capacity. A person with frank law could give sworn testimony in court and serve on juries. Loss of frank law — through conviction of certain crimes, infamy, or attainder — stripped a person of this capacity permanently. Their oaths were legally worthless; they could not be heard.
2. Civil status. Frank law functioned as a shorthand for the bundle of common-law privileges attaching to free status. Bracton treats it as synonymous with "the law of the land" (lex terræ) in this broader sense — the full protection and participatory rights that the common law afforded to freemen.
The term has no surviving modern legal application. It is encountered exclusively in historical English legal sources and in scholarship on medieval and early modern common law.
Common Language
Modern common usage (Wiktionary): "Frank" as an adjective means candid, direct, or open; as a noun (capitalized), it refers to a member of the Germanic Frankish people or to a postal franking privilege. "Law" requires no gloss.
Historical common usage (Webster's 1913): "Frank" means free, open, ingenuous; characterized by freedom from constraint or dissimulation.
The ordinary sense of "frank" as candid or open is misleading here. Frank law has nothing to do with honesty or directness. The "frank" in frank law derives from the Latin/Law French root meaning free (as in a free person, a Frank — the Germanic people associated with freedom in medieval legal tradition), not from the modern English sense of candor. A researcher encountering "frank law" for the first time and reading it as "candid" or "open" law will misunderstand the term entirely.
Common Confusion
Frank law is sometimes loosely conflated with frankpledge or frankalmoin — neighboring medieval English concepts that share the "frank" prefix. These are distinct:
- Frankpledge was a system of collective suretyship organizing freemen into groups mutually responsible for one another's conduct.
- Frankalmoin (free alms) was a tenure by which ecclesiastical bodies held land free of secular service.
- Frank law, by contrast, refers specifically to the personal civil standing of the individual — the privilege of oath, jury service, and full legal participation.
The confusion is understandable because all three terms emerge from the same medieval milieu and the same etymological root, but they address entirely different legal problems.
Why It Matters in Research
Frank law is a gateway concept for researching medieval English legal status, testimonial competency, and the consequences of infamy and attainder in historical common law sources. Several navigational points:
Bracton is the key primary source. Both Rapalje & Lawrence and Burrill direct researchers to Bracton (specifically at fol. 292b) for the fullest treatment of what loss of frank law meant in practice. Any serious research on this term should begin with Bracton's De Legibus et Consuetudinibus Angliae.
The term dissolves into its components. By the time of later English treatise writers, "frank law" as a standalone term largely disappears, absorbed into discussions of testimonial competency (who may be a witness), jury eligibility, and the legal consequences of conviction for infamous crimes. Researchers working in 17th- or 18th-century sources should look under those headings rather than expecting the phrase "frank law" to appear.
Connection to infamy doctrine. The loss of frank law is historically continuous with the common-law doctrine of infamy — the disqualification of witnesses and jurors based on prior conviction. American evidence law inherited fragments of this doctrine, though the terminology shifted entirely. Researchers tracing the history of witness competency or the Fifth Amendment's "infamous crime" language will find frank law relevant as a conceptual ancestor.
Hotchpot connection (Rapalje & Lawrence). The Rapalje & Lawrence entry includes a puzzling reference to hotchpot — the doctrine requiring a donee to bring prior gifts into account before sharing in further distribution. This suggests the entry as reproduced may be a composite or contain a textual bleed from an adjacent entry. Researchers should treat the Rapalje & Lawrence text with care and verify against Bracton directly.
The encyclopedia cross-references below (Dodd-Frank Act entries) are false cognates. The Dodd-Frank Wall Street Reform and Consumer Protection Act shares no historical, conceptual, or etymological connection to frank law beyond the coincidence of the word "frank" in the title (itself derived from Senator Barney Frank's surname). Do not conflate these entries.
Historical Dictionary Support
Burrill provides the most complete and reliable entry. He gives the Law French (fraunche ley), the Latin equivalents (libera lex, lex terræ), situates the term within its common-law context as a privilege of the liber et legalis homo, and flags its synonymous relationship with "law of the land" in Bracton's usage. This is historically sound.
Rapalje & Lawrence confirms the core meaning — "the full benefit and enjoyment of the common law of the land" — and adds the practical consequence: loss meant "perpetual infamy and exclusion from the privilege of giving testimony on oath." The entry also characterizes the loss as a kind of estate "in tail special," though this framing is somewhat unusual and appears to reflect an attempt to fit the concept into a familiar property-law frame rather than its natural home in status and evidence law.
Both sources agree on what was at stake: frank law was not a minor procedural technicality but a fundamental mark of legal personhood. Its loss was among the most serious civil consequences the common law could impose.
Neither source extensively contextualizes frank law within the broader system of medieval villeinage, attainder, or corruption of blood — concepts that are essential for understanding why this status mattered and how it was lost. For that surrounding architecture, researchers must go to Blackstone's Commentaries and to Bracton directly.
Jurisdictional Note
Frank law is exclusively a historical English common-law concept. It was never codified or formally received in American law as a distinct doctrine, though its functional descendant — the common-law rule disqualifying witnesses convicted of infamous crimes — was carried into early American evidence practice and was eventually abolished or modified by statute across American jurisdictions.