The monograph results from scientific research on the problem of documenting information during the Russian-Ukrainian War. The presented publication highlights a comparative analysis of documentation practices in various spheres of social life, examines the experience of assessing the value of documents accepted for preservation, and summarizes methods of documenting cultural objects, including postage stamps and memes. The monographic study may be used in further research on the documentation of testimonies and experiences of war in the fields of humanities, cultural studies, and social sciences, as well as for the development and teaching of academic courses within the specialty B13 “Library, Information, and Archival Studies”.