Letters of request under s 110 of the Evidence Act 1906 (WA) cannot be used to obtain what is in substance third-party discovery from foreign entities. While testamentary evidence directed solely at securing the admissibility of documents can fall within s 110(2)(b), the applicant must establish the existence or probable existence of particular documents and their materiality to an issue in the proceedings; bare unsupported assertions are insufficient. The 'materiality' standard for letters of request is higher than the discovery relevance test.
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