This needs introduction here.
Records in Bulgaria
Most of the archival material of the Sofia Jewish community was burned by the community iself before Jews were deported from the capital during World War II. However, death registers that cover a period of at least 100 years (the first registration date unknown) are held in the synagogue and in the Jewish Plot Office of the Municipal Cemetery.
Vital records from 1878 are kept in municipal distict council
Records in Israel
Some records are held at The Central Archives for the history of the Jewish People Jerusalem (CAHJP). To see
Administratively, Bulgaria is divided into twenty six districts. Each has an archive where civil registration records are preserved. There are no vital records in the National Historical Archive in Sofia.
Records at the Family History Library
The Family History Library has microfilms of civil registration for the districts of Sofia and Plovdiv. In the Family History Library Catalog, look in the Place Search under BULGARIA, [DISTRICT], [LOCALITY] - CIVIL REGISTRATION.
References
Sack, Sallyann Amdur and Mokotoff, Gary. Avotaynu Guide to Jewish Genealogy. Bergenfield, N.J.: Avotaynu. 2004