Definition
A bordereau (plural: bordereaux) is a detailed schedule or summary document used in commercial and insurance contexts to enumerate transactions, risks, or accounts. The term carries two principal meanings in modern legal practice:
1. Insurance and Reinsurance (primary modern usage): A periodic report — typically submitted by a cedent (the insurer) to a reinsurer — itemizing the individual risks, premiums, and losses covered under a reinsurance treaty. Bordereaux serve as the essential accounting mechanism in treaty reinsurance, allowing reinsurers to monitor exposure and calculate their liability without reviewing each underlying policy individually. A premium bordereau lists covered risks and premiums collected; a loss bordereau lists claims and losses paid.
2. French commercial law (historical usage): A memorandum or schedule enumerating the purchases and sales made by a broker or stockbroker, or the itemized statement submitted to a banker with bills presented for discount or coupons tendered for collection.
Common Language
Webster's 1913: "A note or memorandum, especially one containing an enumeration of documents."
Wiktionary: "A detailed statement, especially one containing a detailed listing of documents or accounts. | A form of reinsurance that details the history of the risk."
The common meaning captures the documentary character of the term accurately — a bordereau is indeed a listing or enumeration. What the common definition obscures is the legal weight the document carries in the reinsurance context. In insurance law, a bordereau is not merely a summary for convenience; it is the operative reporting instrument that governs a reinsurer's knowledge of and liability for ceded risk. Errors or omissions in a bordereau can raise disclosure, notice, and coverage disputes with significant legal consequences.
Recognized Forms
/SUBTYPES
Premium Bordereau: A schedule of risks written by the cedent during a reporting period, including policyholder information, coverage dates, and premiums attributable to the reinsurer. Establishes the reinsurer's share of exposure.
Loss Bordereau: A schedule of claims paid or outstanding under policies included in the reinsurance treaty. The primary mechanism by which reinsurers receive notice of losses and calculate reimbursement obligations.
Why It Matters in Research
The term presents a significant historical-to-modern gap that can mislead researchers. In the historical dictionaries, bordereau is framed exclusively as a French commercial law concept — a broker's transaction note or a banking memorandum. This framing reflects the term's European commercial origins and its limited penetration into Anglo-American common law practice at the time those dictionaries were compiled. Researchers consulting only the historical sources will miss the term's dominant modern application entirely.
In contemporary Anglo-American insurance law, bordereau practice is central to the mechanics of treaty reinsurance and appears routinely in coverage disputes, arbitration proceedings, and regulatory filings. The shift from a French commercial document concept to a specialized insurance instrument is not gradual evolution — it reflects the wholesale adoption of the term by the London and U.S. reinsurance markets as a term of art.
For corpus researchers, several traps exist: (1) Pre-twentieth-century legal sources will use the term only in the French commercial or banking sense; do not import that meaning into modern insurance materials. (2) The plural bordereaux is standard in insurance practice — singular bordereau appears less frequently in regulatory and industry documents. (3) Bordereau obligations are typically defined by the reinsurance treaty itself, so the legal significance of any given bordereau depends heavily on contract language rather than statutory definition. Jurisdictional case law on bordereau disputes will usually appear under broader headings of reinsurance law, disclosure obligations, or treaty interpretation rather than under the term itself.
Historical Dictionary Support
Black's Law Dictionary (both editions) and Bouvier's Law Dictionary are in complete agreement: all three trace bordereau to French law, define it as a broker's transaction enumeration or a banking submission document, and cite the same underlying authority (Arg. Fr. Merc. Law, 547). The unanimity of the historical dictionaries reflects the term's origins rather than any independent analysis — all three sources appear to draw from a common French commercial law reference.
What the historical dictionaries collectively miss is significant: they contain no anticipation of the insurance and reinsurance application that would come to dominate Anglo-American legal usage. This is not a failure of the dictionaries so much as a reflection of when they were compiled. The sophisticated reinsurance treaty structures that would make bordereau a term of everyday insurance practice had not yet developed into their modern form. Researchers should treat the historical entries as accurate for their period and jurisdiction, while recognizing them as incomplete guides to the term's modern legal meaning.
Jurisdictional Note
The reinsurance application of bordereau is not jurisdiction-specific in origin — it developed as a market practice in the London and international reinsurance markets and spread to U.S. practice through treaty conventions and industry custom. However, regulatory requirements governing bordereau content and frequency may vary by state in the United States and by jurisdiction in international markets. In Lloyd's market practice, bordereau requirements are often standardized by market agreements.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Reinsurance (for treaty reinsurance structures and cedent-reinsurer reporting obligations); Insurance Documentation (for the role of schedules and notices in insurance contract administration); French Commercial Law (for the historical broker and banking contexts reflected in the historical dictionaries).