A PAN (Permanent Account Number) card is a unique 10-digit alphanumeric identity assigned to taxpayers in India by the Income Tax Department. It serves as a proof of identity and is used for various financial transactions such as receiving taxable salary or professional fees, sale or purchase of assets above a certain value, or for opening a bank account. PAN is mandatory for all Indian citizens and entities conducting financial transactions above a certain threshold.

Aadhaar is a 12-digit unique identity number issued by the Indian government to every individual resident of India. It serves as a proof of identity and address, and is linked to biometric and demographic data. The Aadhaar project was launched in 2009 by the Unique Identification Authority of India (UIDAI) with the goal of providing a universal and secure means of identification for residents of India. The Aadhaar number has become an important document for accessing a variety of services and benefits, such as subsidies, pensions, bank accounts, and mobile phone connections

A passport is an official government-issued document that verifies the identity and nationality of an individual for the purpose of international travel. It allows the holder to travel abroad and serves as proof of who they are and where they are from. A passport typically contains the holder's personal information, photograph, and signature, and is recognized by most countries as a valid form of identification. Passports are issued by a country's government and are mandatory for international travel.

Udyog Aadhaar, also known as the Udyam Registration, is a 12-digit unique identity number issued by the Ministry of Micro, Small, and Medium Enterprises (MSME) in India. It is a self-declaration based registration for micro, small, and medium-sized enterprises. The objective of Udyog Aadhaar is to simplify the process of obtaining various benefits and subsidies provided by the government for the MSME sector and to create a database of all MSMEs in the country. Udyog Aadhaar registration is free of cost and can be done online on the official government portal.

Udyog Aadhaar, also known as the Udyam Registration, is a 12-digit unique identity number issued by the Ministry of Micro, Small, and Medium Enterprises (MSME) in India. It is a self-declaration based registration for micro, small, and medium-sized enterprises. The objective of Udyog Aadhaar is to simplify the process of obtaining various benefits and subsidies provided by the government for the MSME sector and to create a database of all MSMEs in the country. Udyog Aadhaar registration is free of cost and can be done online on the official government portal.