In the context of large public offers for widely held securities processed mechanically, strict compliance with the requirements of the contractual documentation is necessary for a valid acceptance. An incorrect identifying reference (such as an SRN) in an acceptance form may be fatal to the acceptance where it identifies the subject matter as different from what was offered, even if the error was a mistake. The Codelfa ambiguity requirement applies to determine whether extrinsic evidence of surrounding circumstances is admissible to resolve the meaning of an acceptance form.
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