Definition
Warrantia chartæ (Latin: "warranty of charter") was a writ in medieval English law that enforced a grantor's obligation to defend a grantee's title to land. When a feoffment — a transfer of freehold land — included a clause of warranty, the feoffor bound himself and his heirs to guarantee the grantee's quiet enjoyment of the land and to defend the title against any adverse claimants.
The writ became necessary because of a procedural limitation: in certain real actions, particularly assizes, the tenant (defendant) had no right to vouch the warrantor into the proceeding directly. Vouching to warranty was the standard mechanism by which a defendant in a land action could bring in the person who had warranted the title and compel that person to take over the defense. Where vouching was unavailable, the tenant had no procedural means within the existing action to call on the warrantor's obligation. Warrantia chartæ filled that gap. It ran against the warrantor and compelled one of two outcomes: either the warrantor assisted the tenant with a valid plea or defense in the pending action, or, if the tenant lost the land, the warrantor paid damages equal to the value of the land lost.
Why It Matters in Research
This is a narrow, archaic writ of medieval English real property procedure. It will surface primarily in pre-modern English legal materials — Year Books, early treatises, and old practice manuals — and rarely, if ever, in American case law or modern English practice. Researchers encountering this term should understand its purely historical context: warrantia chartæ belongs to the feudal system of land tenure and the old real actions, both of which were substantially abolished in England by the Real Property Limitation Act 1833 and the Common Law Procedure Acts, and which never took firm root in most American jurisdictions.
The key research trap is conflating the writ itself with the broader doctrine of warranty of title in deed covenants. Modern American and English law preserves warranty obligations in real property conveyances through express and implied covenants of warranty in deeds — a functional descendant of the feudal warranty clause — but the procedural machinery of warrantia chartæ is long obsolete. A researcher working on the history of title covenants or the law of real covenants running with the land will find warrantia chartæ instructive as a historical antecedent, not as operative law.
Because this term appears in old practice materials, researchers should also be aware that spelling and Latinization vary across sources. The term appears with and without the ligature (æ), and some sources render it as warrantia cartæ or similar variants reflecting manuscript conventions.
Historical Dictionary Support
Black's Law Dictionary (2nd Ed.) provides the core description: the writ lay for one who, having been enfeoffed with a warranty clause, was impleaded in an assize or other action in which vouching to warranty was procedurally unavailable. The warrantor could then be compelled either to assist with a defense or to render damages and the value of the land. Black's entry is brief and captures the functional essentials of the writ accurately.
The entry reflects the standard treatment found in old English practice literature. Fitzherbert's Natura Brevium and later practitioners' texts on the old real actions describe warrantia chartæ in the context of the broader system of warranty and vouching. The writ is notable primarily because it addressed a procedural gap rather than creating a new substantive right — the substantive obligation of the warrantor already existed by virtue of the warranty clause in the original charter; the writ merely provided an enforcement mechanism when the ordinary procedural route was closed.
Historical sources generally agree on the writ's function. There is no significant divergence in the authorities on what the writ did or when it lay. What historical sources understandably do not address is any modern application, because none exists.
Jurisdictional Note
Warrantia chartæ was an English writ rooted in the feudal land tenure system and has no operative existence in American law. American jurisdictions developed the law of title warranty through deed covenants rather than through the old real actions or their associated writs.