Idaho State Statutes - Idaho Attorney Directory

Terms
with respect to which the confirmatory memoranda of the parties agree or which
are otherwise set forth in a writing intended by the parties as a final
expression of their agreement with respect to such terms as are included
therein may not be contradicted by evidence of any prior agreement or of a
contemporaneous oral agreement but may be explained or supplemented:
(a) By course of dealing or usage of trade or by course of performance;
and
(b) By evidence of consistent additional terms unless the court finds the
writing to have been intended also as a complete and exclusive statement of
the terms of the agreement.

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