Company CIN, sometimes referred to as Company CIN Number or Company CIN No. is a unique identification number assigned by Registrar of Companies (ROC) functioning in various states under Ministry of Corporate Affairs (MCA), Govt. of India. It is being used for finding primary details of companies registered in India under MCA, Govt. of India. After formation of a company, concerned ROC issues a certificate containing its unique Corporate Identification Number (CIN No. or CIN Code) along with its approved name. Every company must quote this unique Company CIN No. whenever a correspondence or data forms submitted to MCA, particularly in audits and reports.