The term "proprietorship" refers to a situation in which a single individual manages a company; the company and the owner are legally one and the same. PAN cards for entities are assumed to belong to their owners.
Although a proprietorship does not need to be registered specifically, the following documents are accepted as official documentation.
Import and Export Code, MSME (Micro, Small and Medium Enterprises) Shops and Establishments Act, and GST (Goods and Service Tax) registration (IEC)