Trade usage supplies terms and interprets language where the practice is sufficiently established that observance is justifiably expected. Its existence and scope are questions of fact.
A party need not know of the usage to be bound if in the trade.
Alternative Names:
Trade Usage|Custom in the Trade
Why it Matters?
Being bound without knowledge is the feature that surprises parties new to an industry, since membership in the trade suffices and actual awareness is not required. Establishing usage requires evidence of regularity through industry testimony, trade association materials, or published standards, not merely that some participants follow the practice. Express contract terms displace inconsistent usage, which limits the doctrine to gaps and ambiguity.
Frequently Confused with
Related terms
Frequently asked questions
Must a party know of the usage?
What proof establishes usage?
