When a case goes on appeal, parties often try to adduce (or offer) new evidence as part of the appeal. Generally, where the new evidence concerns matters which occurred before the date of the decision in the court below, parties are allowed to offer such evidence only with leave (or permission) from the higher court. This is in the interests of finality in litigation, and also of the fair administration of justice (so as to incentivize parties to advance their entire case at trial, rather than deliberately leave over points solely for the purpose of appeals and thereby obtaining a “second bite at the cherry”).
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