Safe custody of seized documents requires secure transmission, handover to investigators, limited retention and preservation duties.

Seized records must be transmitted securely and, where applicable, handed over by an authorised officer to the Investigating Authority, who shall retain books, registers and other records for the period necessary for investigation subject to a maximum retention limit and possible higher level approval; officers must ensure physical records are not altered, damaged or mutilated, electronic records are not altered or erased, and that documents and electronic storage devices are maintained in suitable physical and environmental conditions.

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