A Certificate of Incorporation India Private Limited company or in Short COI is an authoritative report or legal Document that is issued by Ministry of Corporate Affairs (MCA) once an organization is effectively enrolled with them. The COI is proof that the organization is presently enrolled with the Registrar of Companies (ROC). COI issued comprises of a date which depicts the date from which the organization is regarded to be Registered. It would then be able to initiate its business and begin working. It is the obligation or Duty of the promoter to apply for a COI.