Definition
A blanket policy is an insurance policy that covers a class or category of property under a single instrument, rather than scheduling or itemizing specific individual articles. The defining characteristic is that the covered property need not be fixed or precisely identified at the time the policy is issued — the coverage attaches to whatever property falls within the described class at any given moment, accommodating risk that is shifting, fluctuating, or varying in composition or value.
Two related but distinct applications appear in modern usage:
1. Property insurance: A single policy covering multiple locations, structures, or categories of personal property under one aggregate limit. Common in commercial contexts where inventory, equipment, or goods move between locations or change in quantity over time.
2. Blanket vs. specific policy: A blanket policy stands in contrast to a specific policy, which identifies and covers a particular item or items at a fixed value. The distinction affects how loss is calculated, how coinsurance clauses operate, and how the insurer and insured apportion risk.
Common Language
Modern common usage (Wiktionary): "Blanket" as an adjective means applying to all cases or instances without exception; covering everything within a category without specificity.
Historical common usage (Webster's 1913): "Blanket" used attributively meant covering or applicable to a broad, undifferentiated range — as in "a blanket order" covering all purchases of a given type.
The common meaning is close enough to the legal meaning that no sharp gap exists, but the legal term carries precise technical consequences that the ordinary adjective does not. In insurance law, "blanket" is not merely descriptive shorthand for "broad" — it triggers specific doctrines governing how losses are valued, how coinsurance requirements apply, and whether the insured must prove the specific identity of lost items or only that loss occurred within the covered class.
Common Confusion
BLANKET POLICY vs. FLOATER POLICY: These terms are sometimes used interchangeably in older sources and trade usage, but they are technically distinct. A floater policy (or floating policy) covers property that moves from place to place — the coverage follows the goods. A blanket policy covers a class of property at one or more locations regardless of whether that property moves. The overlap is real: property that is both mobile and variable in quantity may be covered by instruments that function as both. Researchers should not assume that a historical source using "floater" excludes the blanket concept, or vice versa.
BLANKET POLICY vs. OPEN POLICY: An open policy (common in marine insurance) leaves the value of covered property to be declared or ascertained later. A blanket policy may also leave total insured value somewhat fluid, but the defining feature of a blanket policy is the class-based coverage structure, not the valuation method.
Why It Matters in Research
The historical definitions in the Law Mind corpus are narrow and fire-insurance-specific. Both Black's editions and Bouvier define blanket policy exclusively in the context of fire insurance, citing Wood on Insurance and a Supreme Court reference at 93 U.S. 541. Modern usage has expanded far beyond fire insurance — blanket policies appear routinely in commercial property, liability, health, and employee benefit contexts. Researchers using 19th- or early 20th-century sources should not assume that doctrinal rules developed for fire insurance blanket policies translate directly to modern blanket coverage structures.
The distinction between blanket and specific coverage becomes critical in loss adjustment. When a blanket policy covers a class of property and only part of that class is destroyed, courts and adjusters must determine the value of the lost portion from the whole — a calculation that raises evidentiary and appraisal questions distinct from those arising under specific policies. Historical cases resolving these questions often turned on the wording of the coinsurance or average clause, which varied significantly by insurer and era.
For researchers examining employment law sources, "blanket policy" appears in a different and unrelated context: employer workplace policies (drug testing, conduct, leave) described as "blanket" to indicate uniform, categorical application to all employees without individualized assessment. This usage is entirely distinct from the insurance law term and should not be conflated. See employment_13.
The corpus connection to contracts_190 is the most directly useful for insurance policy interpretation questions — that entry addresses how courts construe ambiguous policy language, a perennial issue with broadly worded blanket coverage provisions.
Historical Dictionary Support
All three source dictionaries are in agreement and nearly verbatim: Black's (1st and 2nd editions) and Bouvier's all define the blanket policy as a policy where "the risk is shifting, fluctuating, or varying" and coverage is "applied to a class of property, rather than to any particular article or thing." All three trace to the same source: 1 Wood, Insurance § 40, and the same case reference (93 U.S. 541). This uniformity reflects how settled the basic concept was in late 19th-century insurance law.
What the historical dictionaries do not address: valuation methods under blanket policies, the interplay with coinsurance and average clauses, multi-location blanket coverage, or any application outside fire insurance. Researchers relying solely on these dictionary definitions will have an accurate but incomplete picture of how the term functions in modern practice and litigation.
Jurisdictional Note
State insurance regulation affects how blanket policies must be structured, filed, and interpreted. Some states impose specific requirements on blanket health or accident policies (often covering groups such as employees or students) that differ from requirements governing property blanket coverage. The term "blanket policy" in state insurance codes may carry a statutory definition that diverges from the common law meaning.
Encyclopedia Cross-Reference
contracts_190: Insurance Contracts — Interpretation and Construction of Insurance Policies (The Law Mind Contracts & Commercial Law Encyclopedia)
employment_13: Drug Testing and Substance Abuse Policies (The Law Mind Employment & Labor Law Encyclopedia) [for the unrelated workplace policy usage of "blanket"]