It contains the correspondence between Yusuf İzzeddin Efendi's wives, children, Tevfik Biren, and his wife Necla Biren, as well as receipts showing their expenses. The fond consists of 4.048 documents (1,330 files) and covers topics such as the distribution of income among family members, expenses incurred, and the management of property.

Grignano’dan ayrılıp Köstence’ye hareket edeceklerine, Osmanlı hanedanına ait gayrımenkul satışı konusunda Millet Meclisi’ne dilekçe verilmesine ve ödenecek borçlara dair Hasan Hayri Bey’in Tevfik Bey’e mektubu.