The Preservation and Collection phase is concerned with the acquisition of electronic information (data) marked as potentially relevant in the identification phase. There is an overriding requirement that electronic information should be collected in a manner that is comprehensive, maintains its content integrity and preserves its form.
Preservation and Collection efforts typically follow the methodologies outlined in the ACPO guidelines, whereby all sources of potential evidence (including metadata) are acquired in accordance with leading practice standards, the integrity of evidence is guaranteed, chain-of-custody records maintained, detailed documentation sets (often based on templates) created, and acquired evidence securely stored and transported to the destination of processing.