5. Essential Documents

5.1. Safe-Keeping

The investigator must ensure that the ‘Investigator Site File’ (ISF) (officially the ‘Investigator Trial Master File (TMF)’) is safely archived in such a way that the documents and data can be found and read at a later time if questions come up or an inspection by the competent authorities takes place.

Systems must be in place to ensure the safe long-term storage of essential documents:
Different EU directives/regulations as well as international guidance documents give different retention periods for trial related documentation.