What is the Standard of Proof?


The standard of proof refers to the amount of evidence that is necessary and needed to prove an assertion or claim in a trial in court – what needs to be established in order to win a case. The standard of proof required varies depending on the type of case. For example, in a medical negligence case, the standard of proof is “on the balance of probabilities”. The claimant must prove that their injury is more likely than not to have been caused by the “breach of duty”. Another way of looking at it is in percentage terms, i.e. 51% or more. This is a much lower standard than in a criminal case where the standard if “beyond reasonable doubt”.


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