Definition
Arsz et pensatz (also rendered "arsi et pensati") is a historical term meaning "burnt and weighed." It described money or coin that had been tested and verified by two methods: assay by fire (to confirm metal purity) and weighing (to confirm metal content by mass). The phrase identified currency that had passed both forms of quality examination and was therefore accepted as genuine and of full value.
Why It Matters in Research
This term appears almost exclusively in medieval and early modern English legal and financial records. Researchers encountering it in historical documents — writs, exchequer rolls, pipe rolls, or records of monetary obligation — should understand it as a technical qualifier on the character of payment, not merely a description of a physical process. When a debt or obligation was stated to be payable in coin arsz et pensatz, it meant the creditor was entitled to currency verified by assay and weight, a standard higher than mere face value. This distinction mattered in periods of currency debasement, when circulating coin might be clipped, worn, or of reduced metal content despite bearing a nominal value.
Researchers working in corpus materials covering English monetary history, exchequer practice, or the law of debt and obligation before the seventeenth century may encounter this phrase as a term of art. It signals a quality specification in the payment obligation and connects to broader historical legal questions about the definition of lawful money and the discharge of debt. Because the term is largely absent from modern legal vocabulary, it will not appear in contemporary treatises; it belongs to the paleographic and archival layer of legal research. Researchers should be cautious about transcriptions — variant spellings are common in manuscript sources, and the phrase may appear in heavily Latinized or Anglo-Norman forms.
Historical Dictionary Support
Black's Law Dictionary (2nd Ed.) defines the term concisely as "Burnt and weighed," and explains it was "formerly applied to money tested or assayed by fire and by weighing." This is the primary modern legal dictionary reference. Black's does not elaborate on the procedural or contractual context in which the term arose, nor does it trace the history of currency assay practice that gives the phrase its meaning. The definition is accurate as far as it goes but offers no guidance on how the term functioned in legal instruments or what obligations it created.
The phrase reflects a system of monetary verification rooted in the physical properties of precious metal coinage. Fire assay (the "arsi" component) tested purity by heating; weighing (the "pensati" component) measured mass. Together, these two tests provided a basis for certifying the intrinsic value of coin independently of its face denomination — a critical distinction in an era when the nominal and intrinsic values of currency could diverge significantly through debasement or physical degradation. The legal significance of the term is thus inseparable from the history of English coinage standards and exchequer practice.
No major historical legal dictionaries beyond Black's are reflected in the available source material for this entry. Researchers seeking fuller treatment should consult works on medieval English monetary law and exchequer history.