Definition
A Latin phrase of civil law meaning "by aid and counsel." The term describes a form of secondary participation in a wrongful act — specifically, assisting another in committing an offense through advice, guidance, or support rather than through direct physical action. It is the civil law functional equivalent of "aiding and abetting" in common law systems.
The phrase is most often encountered in its fuller and more complete form, ope et consilio — "by means and counsel" — of which "ofe consilio" appears to be an abbreviated or corrupted rendering. In either form, the concept captures complicity through facilitation: the person designated ope et consilio does not commit the act with their own hands but enables or encourages another who does.
Common Confusion
The abbreviated rendering "ofe consilio" found in this source should not be treated as a standard or independent legal phrase. It is either a scribal error, a typographical corruption, or an editorial shorthand. The operative term is ope et consilio. Using the abbreviated form as a search term in historical databases without also searching the full form will produce an incomplete and misleading picture of how the concept appears in primary sources.
Ope et consilio should also not be confused with ex consilio alone, which refers more narrowly to action taken by advice or on the counsel of another, without the additional component of material assistance captured by ope.
Why It Matters in Research
Researchers encountering this phrase in historical sources should treat it as a marker of civil law influence, whether in Roman law sources, early American treatises drawing on civilian tradition, or mixed-jurisdiction materials from Louisiana or other civil law-inflected jurisdictions.
The abbreviated form "ofe consilio" — as recorded in Black's 2nd Edition Supplemental — is almost certainly a transcription or typographical artifact. The authoritative form is ope et consilio. Any corpus search using the abbreviated form alone will miss the vast majority of historically relevant uses. Search both forms, and cast a wider net using ope et consilio as the primary string.
The concept connects directly to the broader civil law treatment of accomplice liability and is frequently paired with discussion of principals versus accessories. Common law courts occasionally borrowed the civilian vocabulary when adjudicating matters with Roman law heritage, particularly in equity, admiralty, and early criminal treatises. Burrill's citation in Black's signals that the term appears in legal lexicography as a recognized term of art, not merely as passing Latin phrasing.
Researchers should also note that the civil law distinction between acting ope (by means or physical assistance) and consilio (by counsel or advice) maps imperfectly onto common law aiding and abetting doctrine. The civil law formulation preserves an analytical separation between material assistance and intellectual contribution that common law tends to collapse into a unified accomplice category. This distinction can be significant when reading older treatises that use the civil law vocabulary to parse what a modern researcher might expect to find analyzed under a single accessory framework.
Historical Dictionary Support
Black's Law Dictionary (2nd Ed.) Supplemental records the entry briefly and accurately: a Latin civil law term applied to accessories, analogous to aiding and abetting at common law, often written ope et consilio, with attribution to Burrill. The entry is spare but reliable as a pointer. It does not elaborate on the civil law framework that gives the phrase its doctrinal context, nor does it distinguish between the ope and the consilio components.
What the historical dictionary record misses is the Roman law depth behind the phrase. In Roman private law, particularly in the law of delict, secondary participants who contributed through counsel (consilio) rather than direct action were recognized as liable, but the nature and extent of that liability was subject to ongoing doctrinal development. The Black's entry, like most common law dictionary treatments, flattens this history into a simple common law analogy. Researchers tracing the concept into its civilian roots will need to move beyond the dictionary literature.
Jurisdictional Note
The phrase carries the most doctrinal weight in civil law jurisdictions and in American states with significant civilian heritage, particularly Louisiana. In common law jurisdictions, it appears primarily in historical or comparative contexts, in equity proceedings, and in admiralty, where civilian influence was historically stronger.