Case law is the body of written court decisions that explains how legal rules apply to real disputes.
Why case law matters
Case law matters because legal rules often become meaningful only after courts interpret and apply them. A statute may state a broad rule, but case law can show how that rule works in specific facts.
Case law also helps people predict how courts may treat similar disputes in the future.
Where case law appears
Case law appears in judicial opinions, legal research databases, briefs, motions, and court orders. Judges may rely on prior decisions when deciding whether a claim can proceed, whether evidence is admissible, or what legal standard applies.
Practical example
A statute says a landlord must provide habitable housing. Case law may explain what counts as uninhabitable, what notice is required, and what remedies may be available.
How case law differs from nearby terms
Case law differs from common law because case law refers to the decisions themselves, while common law refers to judge-made legal rules developed through those decisions. It differs from precedent because precedent is a prior decision used as authority in a later case.
Related terms
Quick knowledge check
Why might a lawyer research case law even when a statute already exists?