SC /ST / OBC certificates (caste certificates) are issued by SDOs in all Sub- Divisions. In Kolkata, such certificates are issued by DWO, Kolkata. Caste certificates for SC & ST are issued in terms of The Scheduled Castes and Scheduled Tribes (Identification) Act, 1994. OBC certificates are issued in terms of Govt. Notification No. 347-TW / EC dated 13-07-1994.