Definition
In Roman and civil law, a pollicitatio is a unilateral promise — an offer or declaration of intention to give or do something — that does not yet have the acceptance or corresponding promise of another party necessary to form a binding contract. It is, in essence, a promise without mutuality: the promisor has spoken, but no obligatory bond has been created because no one has accepted or provided consideration in return.
The concept is Roman in origin and was elaborated in the Digest of Justinian. Classical Roman jurists recognized that a pollicitatio occupied an intermediate space between a bare, unenforceable expression of intent and a fully formed contractual obligation (obligatio). In limited circumstances — particularly promises made to a municipality or in connection with a public office or religious occasion — Roman law did treat the pollicitatio as enforceable even absent acceptance, if the promisor had begun performance or if the public interest warranted it. Outside those special categories, however, the general rule held that a unilateral promise created no legal duty.
Common Confusion
POLLICITATIO vs. PACTUM vs. STIPULATIO: These three Roman-law concepts are often grouped loosely under the heading of "promise" in secondary sources, but they are not interchangeable. A stipulatio was the formal, enforceable oral contract of Roman law, requiring a specific question-and-answer exchange. A pactum was an informal agreement between parties that could, in some circumstances, generate obligations. A pollicitatio, by contrast, involves only one party: there is no exchange, no second party's acceptance, and generally no enforceable duty. Researchers reading civil-law treatises must be careful not to translate any of these terms simply as "promise" and then apply common-law contract analysis.
Why It Matters in Research
This term surfaces almost exclusively in Roman law materials, civil law treatises, and comparative law scholarship. Researchers are unlikely to encounter it in American common-law cases unless the decision engages civilian doctrine directly — for example, in Louisiana jurisprudence, Scots law commentary, or in academic writing on the foundations of contract law.
The key research trap is the temptation to equate pollicitatio with an "offer" in the modern common-law sense. A common-law offer, once communicated, creates the power of acceptance and can ripen into a contract. A pollicitatio generally created no such power and no obligation — the Roman law default was that the promisor remained free to revoke. The limited exceptions carved out for public promises (to a city, in connection with a vow or a public office) have no clean counterpart in common-law offer-and-acceptance doctrine and should not be imported without care.
Researchers tracing the philosophical and historical foundations of contract theory — particularly debates about whether a bare promise can or should generate legal obligation — will encounter pollicitatio in the works of natural law theorists including Grotius and Pufendorf. Grotius's treatment in De Jure Belli ac Pacis distinguishes between a pollicitatio (no obligation) and a promissio (obligation once the offeree has an interest), a distinction that significantly influenced later European contract thought. That lineage matters when reading early American treatise writers who drew on natural law sources.
For Louisiana researchers specifically: Louisiana's mixed legal system means civilian concepts like pollicitatio may inform doctrinal analysis in ways they would not in other states. The Louisiana Civil Code's treatment of obligations and the role of cause provides context that common-law frameworks do not.
Historical Dictionary Support
Burrill's Law Dictionary defines pollicitatio as "[a] promise, without mutuality," citing the Digest (50.12.3) and Grotius. The entry is characteristically spare — Burrill gives the civil-law origin and the essential distinguishing feature (absence of mutuality) without elaborating the Roman jurists' exceptions for public promises. This compression is a limitation: a researcher relying on Burrill alone would not learn that Roman law did, in carefully bounded circumstances, treat certain pollicitationes as binding. The Digest passage cited (D. 50.12.3) addresses promises made to municipalities, which is precisely one of those exception categories — making the citation more instructive than the brief definition suggests. Grotius's treatment (De Jure Belli, Book II, Chapter 11, §3) goes further, using the term within a broader theoretical account of when promises bind in conscience and in law.
No other shelf sources in the Law Mind corpus appear to carry a dedicated entry for this term, which itself signals its character: pollicitatio belongs to the vocabulary of Roman and civil law scholarship rather than to working common-law practice.
Jurisdictional Note
This concept is most relevant in jurisdictions whose private law retains civilian foundations, particularly Louisiana and Quebec. In purely common-law jurisdictions, the term appears only in historical, comparative, or theoretical contexts. It has no technical operative meaning in English common-law contract doctrine.