Partnership: An agreement between the persons who want to form a partnership firm is necessary. As far as possible it should be in writing. A partnership firm should be registered with the Registrar of firms.
Joint Hindu Family business: No legal formality to run as per Hindu Law. If the business is owned by the members of Hindu joint family.
Joint Stock Company: It must be registered under the Indian Companies Act. It may be a Private Limited Company or a Public Limited Company.
Cooperative Society: If the business is organized as a cooperative society, it is required to be registered with the Registrar of Cooperative Societies of the State in which societies registered office is to be situated.