dossier
noun /ˈdɒsieɪ/
  /ˈdɔːsieɪ/
(formal)- a collection of documents that contain information about a person, an event or a subject synonym file
- to assemble/compile a dossier
 - dossier on somebody/something We have a dossier on him.
 
Extra Examples- The dossier contained details of every meeting the two men had attended.
 - The group compiled a dossier of patients' complaints.
 - They kept dossiers on all trade union members.
 
Word Originlate 19th cent.: from French, denoting a bundle of papers with a label on the back, from dos ‘back’, based on Latin dorsum.