Definition
A Latin pleading term meaning "he paid after the day." Solvit post diem is a common law plea in an action of debt on bond, by which the defendant acknowledges that payment was not made on the date stipulated in the bond but asserts that full payment was made after that date and before the commencement of the lawsuit. The plea operates as a confession and avoidance: the defendant does not deny the obligation or the late payment, but contends that because the debt was satisfied prior to suit, no action should lie.
The plea stands in contrast to solvit ad diem — "he paid on the day" — which asserts timely performance of the bond's payment condition.
Common Confusion
SOLVIT POST DIEM vs. SOLVIT AD DIEM: These two pleas are closely related and frequently appear together in historical pleading texts, but they assert distinct facts. Solvit ad diem alleges that payment was made on or before the exact date named in the bond, making the performance timely and complete. Solvit post diem concedes the lateness of payment but argues that payment was nonetheless made before suit was brought. The practical legal consequence differed: in some contexts, late payment on a penal bond at common law did not automatically defeat the plaintiff's right to nominal or statutory relief, making the distinction between the two pleas procedurally significant.
Why It Matters in Research
Researchers working in pre-twentieth-century common law pleading materials — particularly English nisi prius records, American circuit court files, and treatises on the law of bonds and debt — will encounter this plea as a standard formal entry in actions of debt. Several navigational points deserve attention.
First, the plea belongs to a cluster of Latin pleading formulas that were in active use through the era of common law pleading in both England and the United States, but became obsolete after the adoption of code pleading reforms (Field Code in New York, 1848, and subsequent state adoptions). Researchers tracing the disappearance of such pleas should look to the pleading reform literature of the mid-nineteenth century rather than expecting to find the formula in post-reform practice materials.
Second, the plea's practical force depended heavily on the law of penal bonds. A bond typically named a precise payment date; failure to pay on that date technically forfeited the penalty. Courts of equity had long intervened to relieve against such forfeitures upon proof of subsequent payment, and eventually statutory and common law reforms in both England and America provided similar relief at law. Solvit post diem was the vehicle through which a defendant at law could raise this equitable-style argument without resorting to Chancery. Understanding this context is essential to reading the plea correctly in original sources.
Third, researchers should be aware that the plea appears in practice manuals under varying spellings and abbreviations. Burrill and Black both cite 1 Archbold's Nisi Prius for its technical formulation; Rapalje and Lawrence cite Selwyn's Nisi Prius. These are the primary treatise sources for verifying the exact elements of the plea as practiced.
Fourth, the plea was available only in actions on bonds — instruments under seal with a stated payment date. It did not apply to simple contract actions, open accounts, or other debt forms where no fixed payment day had been named in a sealed instrument. Researchers who encounter the plea in a case file but are uncertain about the underlying instrument type should confirm the nature of the obligation before drawing conclusions about the legal theory in play.
Historical Dictionary Support
Black's, Rapalje & Lawrence, and Burrill's Law Dictionary are in close agreement on the core definition: all three identify the term as a plea in an action of debt on bond, asserting payment after the stipulated day but before suit. Burrill adds the characterization "technical name," confirming that this was a term of art in formal pleading rather than a descriptive phrase used loosely. All three sources cite Archbold's Nisi Prius (1 Arch. N. Pr. 222) as the authority, with Rapalje additionally citing Selwyn's Nisi Prius — the two dominant English nisi prius practice works of the early nineteenth century.
None of the three sources elaborates on the equitable background of the plea, the history of relief against forfeiture of penal bonds, or the plea's fate under code pleading reforms. Researchers should not expect historical dictionaries to fill that context; treatises on the law of contracts, bonds, and pleading reform are necessary supplements.
Jurisdictional Note
The plea was recognized in both English and American common law courts during the era of formal pleading. Its availability and significance varied by whether the jurisdiction had adopted equity jurisdiction at law or retained a separate Chancery system for relief against bond forfeitures. After code pleading reforms swept through American jurisdictions in the latter half of the nineteenth century, the formal Latin plea structure dissolved, and the underlying defense would be raised by general allegation of payment or satisfaction.