ADMINISTRATIVE LAW - RIGHT TO INFORMATION - REFUSAL OF ACCESS - NONEXISTENT OR UNLOCATABLE DOCUMENTS - request made by an eligible family member for information about management and administration of financial affairs and estate of a late relative - applicant submits file notes and medical reports should exist - whether agency has taken all reasonable steps to locate requested documents - whether access to further documents may be refused on the basis the documents are nonexistent or unlocatable - sections 47(3)(e) and 52(1) of the Right to Information Act 2009 (Qld)