You know what it looks like… but what is it called?
TAKE THE QUIZ“Evidence rule”
The following 2 entries include the term Evidence rule.
best evidence rule
noun: a rule of evidence: in order to prove what is said or pictured in a writing, recording, or photograph the original must be provided unless the original is lost, destroyed, or otherwise unobtainable
parol evidence rule
noun: a rule of document interpretation: parol evidence offered to contradict or modify a writing (as a contract or will) is not admissible when the writing is unambiguous or was intended to be a final expression of the author's wishes