A document prepared for litigation that reproduces or is derived from electronic business records is admissible under s 79C(2a) of the Evidence Act 1906 (WA), even though the document itself is not a business record. There is no requirement under s 79C to produce the underlying electronic data or to call all persons involved in extracting the data. Contractual certification clauses in mortgages and guarantees that make a bank's certificate 'sufficient evidence' of amounts owing shift the onus to the borrower to prove the certificate incorrect, and the bank need not prove the date and amount of each individual advance. A response to a request for particulars stating inability to provide details does not constitute an admission requiring leave to withdraw.
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