Definition
A Latin phrase meaning "concerning excuses." De excusationibus is the title of the first section of Book 27 of the Digest (also called the Pandects), part of the Corpus Juris Civilis compiled under the Emperor Justinian in the sixth century. That section systematically catalogues the circumstances under which a person could be lawfully excused from serving as a tutor (guardian of a minor) or curator (guardian of an incompetent or absent adult) under Roman law. The recognized excuses included military service, poverty, advanced age, holding public office, and certain professional occupations. The term is not used as a substantive legal concept in modern common-law jurisdictions; it functions instead as a bibliographic and doctrinal reference point within Roman law scholarship and the civil law tradition.
Why It Matters in Research
Researchers encounter de excusationibus primarily in two contexts: historical treatments of Roman guardianship law, and broader studies of the Corpus Juris Civilis as the foundation of civil law systems. Because the term is a title rather than a standalone legal doctrine, it does not appear as a keyword in case law, statutory indexes, or modern treatises outside of Roman law or comparative law scholarship.
The practical research trap is mistaking this phrase for a general Latin maxim or a common-law defense theory. It is neither. A researcher searching for excuses from legal duty in common-law sources will find no useful analogue here; the relevant common-law concepts — such as impossibility, exemption from jury duty, or statutory exceptions to mandatory appointment — developed independently.
For civil law jurisdictions tracing guardianship or curatorship rules to Roman origins, Book 27 of the Digest remains a foundational source. Researchers working in Louisiana, Quebec, or comparative private law should note that the excuses enumerated in de excusationibus influenced early codifications of guardianship exemptions, though modern civil codes have largely displaced the original Roman categories with statutory lists.
The concentration of extracts from Herennius Modestinus (a third-century Roman jurist who wrote extensively on excuses in Greek) gives Book 27 an unusual character within the Digest. Modestinus wrote a dedicated treatise on this subject, and his influence on the compiled text is proportionally greater here than in most other sections of the Pandects. Researchers using the Digest for comparative or historical purposes should be aware of this authorial concentration when assessing the coherence or internal consistency of the section.
Historical Dictionary Support
Black's Law Dictionary (both the first and second editions) and Burrill's Law Dictionary are in full agreement on the substance of this entry. All three sources identify de excusationibus as the title of Book 27 of the Pandects, describe its subject as circumstances excusing service as tutor or curator, and note the dominant role of Modestinus in the compiled text. Burrill adds the specific attribution to Herennius Modestinus and notes that his contributions derived from a Greek-language work on the subject — a detail Black's omits, though it is historically significant given the otherwise Latin character of the Digest.
None of the historical dictionaries provide substantive analysis of the actual excuses enumerated in Book 27, nor do they situate the title within the broader structure of Justinianic law. They function purely as cross-references for researchers who have encountered the phrase in a primary source. Modern Roman law scholarship, including Alan Watson's translations of the Digest, provides the substantive content that the dictionary entries do not.
Encyclopedia Cross-Reference
No Law Mind Encyclopedia entry directly addresses Roman guardianship law or the Corpus Juris Civilis. The closest structural analogues — doctrines involving legal excuse, appointment, and responsibility — appear in different contexts across the corpus and do not map meaningfully onto de excusationibus.