Definition
Servitium forinsecum (Latin: "extrinsic" or "foreign service") is a feudal legal term denoting the military and public obligations owed by a tenant not to the immediate lord of the fee, but to the king or some higher sovereign authority. It stood in contrast to servitium intrinsecum — the service owed directly to one's own lord by reason of holding land under that lord's fee. Servitium forinsecum was, in essence, the crown's claim upon the tenant's service that ran alongside, and took precedence over, whatever private tenure obligations existed between lord and tenant.
In practical terms, this meant that a tenant holding land in fee could owe two overlapping layers of service: intrinsic service to the mesne lord who enfeoffed him, and forinsec service to the king — the latter arising from the tenant's position within the broader feudal structure of the realm rather than from any direct grant by the crown.
Common Confusion
SERVITIUM FORINSECUM / SERVITIUM INTRINSECUM: These paired terms are the natural source of confusion and must be read together. Intrinsecum servitium was confined to what was owed within the lord-tenant relationship — rent, agricultural service, suit of court. Forinsecum servitium extended outside (foris) that private relationship to obligations running to the king, typically military in character. A researcher finding one term in a medieval or early modern source should immediately look for the other: documents that define or limit one usually imply the existence of the other.
Why It Matters in Research
This is a term of historical feudal law with no surviving operational significance in modern common law jurisdictions. Researchers will encounter it almost exclusively in:
1. Medieval English tenure documents, grants, and charters, particularly those defining the scope of a lord's authority over his tenants or the crown's residual claims on feudal service.
2. Early common law treatises and Year Book commentary addressing the structure of feudal obligation. Coke's commentary on Littleton (Co. Litt. 65, cited in Black's) is the primary bridge between medieval practice and later legal exposition.
3. Ecclesiastical and monastic records. Bouvier's citation to Monasticon Anglicanum signals that forinsec service appears with some frequency in records concerning church landholdings, where the question of what service a monastic lord could extract versus what the crown retained was practically significant.
The chief research trap is anachronism. Modern readers accustomed to property law built on fee simple absolute may import assumptions about the unity of ownership that simply did not apply in a system where multiple parties held simultaneous enforceable claims on the same land's service obligations. When reading any medieval tenure instrument, forinsecum service clauses indicate the document is negotiating the boundary between private and royal claims — a fact with significant implications for how the document functions legally.
Jurisdictional reach is narrow: this concept was specific to English feudal law and did not transplant meaningfully into American legal practice. Researchers working in American property law history will find the term only as background doctrine, if at all.
Historical Dictionary Support
Black's and Bouvier's agree on the essential structure: forinsec service is the service that exceeds or runs outside (foris) the service owed to the mesne lord, going instead to the king. Both sources confirm the binary pairing with intrinsec service.
Black's is the more analytically useful of the two entries. It supplies the Latin maxim from Coke — Servitium, in lege Angliae, regulariter accipitur pro servitio quod per tenentes dominis suis debetur ratione feodi sui — which is instructive precisely because it defines what "service" ordinarily meant in English law (service from tenant to lord, by reason of the fee), thereby setting up forinsecum as the departure from that ordinary meaning: service that escapes that private lord-tenant frame and flows to the crown.
Bouvier's entry is briefer but adds a useful pointer: the reference to Mon. Angl. ii. 48 (William Dugdale's Monasticon Anglicanum) grounds the term in a concrete archival tradition and confirms that forinsec service obligations appear in recorded ecclesiastical tenure arrangements. Bouvier also explicitly cross-references INTRINSECUM SERVITIUM, which Black's handles only by implication — a reminder that Bouvier's cross-reference apparatus is sometimes more systematically deployed than Black's for feudal terminology.
Neither dictionary addresses the practical mechanics of how forinsec service was assessed or collected, nor the ways in which statutes such as Quia Emptores (1290) affected the perpetuation of these dual-service obligations by prohibiting subinfeudation. That statutory context is essential for understanding when and why the term appears in the historical record, and both dictionaries' silence on it is a genuine gap for researchers.
Jurisdictional Note
Servitium forinsecum was a doctrine of English feudal law. It has no recognized analog in Scots law, civil law systems, or American common law. Researchers in English legal history should be aware that the practical significance of the distinction between forinsec and intrinsec service diminished substantially following the abolition of military tenures by the Tenures Abolition Act 1660.