Definition
Arsab et pensatae (also rendered as arsae et pensatae) is a Latin phrase meaning "burnt and weighed." It was applied historically to coins or money that had been subjected to two forms of quality testing: assay by fire (to determine metallic purity) and verification by weight (to confirm mass). The phrase describes a standard of monetary proof used in medieval fiscal and exchequer practice to confirm the genuine value of currency tendered to the crown or in official transactions.
Common Confusion
The phrase is occasionally abbreviated or corrupted in manuscript sources, and researchers may encounter variant spellings — arsae et pensatae, arsae et ponderatae, or similar forms — across Latin administrative records. These are the same concept and should not be treated as distinct terms. The phrase should also not be confused with general assay terminology appearing in metallurgical or commercial contexts, where "burnt" refers to a broader range of fire-refining processes unconnected to fiscal verification.
Why It Matters in Research
This term belongs to the technical vocabulary of medieval English exchequer and revenue administration and will appear primarily in Latin fiscal records, Pipe Rolls, and accounts relating to royal revenue collection. Researchers working in these sources should be alert to several navigational points.
First, the phrase signals a specific standard of monetary accountability, not merely a description of coins. When money is recorded as arsab et pensatae, the record is asserting that the funds were tested for purity and weight — a higher evidentiary standard than coin simply counted by tale (numerata). This distinction matters for understanding disputes or audit entries in exchequer records.
Second, the term reflects the medieval problem of coin debasement and clipping. Because coinage in circulation often varied in actual silver content, the crown required that revenue payments meet the burnt-and-weighed standard rather than accepting coins at face value. Understanding this context helps interpret apparent discrepancies in medieval financial records.
Third, the term is essentially extinct in modern legal usage. A researcher who encounters it will almost always be working with primary sources in Latin from the medieval period or with secondary historiography discussing Angevin or Plantagenet fiscal administration. It will not appear in modern statutes, case law, or equity practice.
Fourth, indexing and search in digitized historical corpora may be complicated by spelling variation. Running searches for arsae, pensatae, and ponderatae alongside arsab is advisable when doing comprehensive corpus work.
Historical Dictionary Support
Black's Law Dictionary (2nd Ed., Supplemental) provides the only dictionary entry identified for this term, defining it concisely as "burnt and weighed" and noting its application to money "tested or assayed by fire and by weighing." The entry is accurate as a gloss but offers no procedural or historical context.
No entry for this term appears in the main body of Black's, nor in Bouvier's Law Dictionary or other standard historical legal dictionaries surveyed in the Law Mind corpus. Its absence from those sources is itself informative: the term was already archaic when nineteenth-century legal dictionary compilers were working, and it was treated as a curiosity of medieval fiscal Latin rather than a term with living legal application. Researchers should not expect to find substantive discussion of arsab et pensatae in American or post-medieval English legal sources.
The term's primary elaboration exists in historiographical literature on Angevin financial administration, Pipe Roll scholarship, and medieval monetary history — disciplines adjacent to legal history rather than strictly within the legal dictionary tradition.
Jurisdictional Note
Exclusively a term of medieval English royal fiscal administration. It has no recognized equivalent or usage in Scottish, Irish, continental European, or American legal sources. Researchers should confine their search to English crown records.