IFSC (Indian Financial System Code)-11 Digits 

IFSC code is developed to initiate electronic money transfer between banks within India.

MICR (Magnetic Ink Character Recognition)-9 Digits

MICR is a Magnetic Ink Recognition technology for making cheque processing faster and simpler. 
First three digits: City Code (city in which the bank branch is located)
Next three digits: Bank Code
Last three digits: Bank Branch code

SWIFT Code(Society for Worldwide Interbank Financial Telecommunication (SWIFT)

A SWIFT code is an international bank code that identifies particular banks worldwide. It’s also known as a Bank Identifier Code (BIC).  SWIFT codes used to send money to overseas banks.

8 Digit Code – Bank or Financial Institution
11 Digit Code – Bank’s Branch

• First 4 characters - bank code (only letters)
• Next 2 characters - ISO 3166-1 alpha-2 country code (only letters)
• Next 2 characters - location code (letters and digits) (passive participant will have "1" in the second character)
• Last 3 characters - branch code, optional ('XXX' for primary office) (letters and digits)

PAN Number  (Permanent Account Number)

•  Income Tax PAN card is issued under Section 139A of the Income Tax Act. 
•  The PAN structure is as follows: AAAPL1234C: 
•  First five characters are letters, next four numerals, last character letter. 
•  The first three letters are sequence of alphabets from AAA to ZZZ 
• The fourth character informs about the type of holder of the card. Each holder is uniquely defined as below: A — Association of Persons (AOP) B — Body of Individuals (BOI) C — Company F — Firm G — Government H — Hindu Undivided Family L — Local Authority J — Artificial Juridical Person P — Individual T — Trust(AOP) K — Krish (Trust Krish) 
• The fifth character of the PAN is the first character (a) of the surname or last name of the person, in the case of a "Personal" PAN card, where the fourth character is "P" or (b) of the name of the Entity, Trust, society, or organisation in the case of Company/ HUF/ Firm/ AOP/ BOI/ Local Authority/ Artificial Judicial Person/ Govt, where the fourth character is "C","H","F","A","T","B","L","J","G". 

• The last character is an alphabetic check digit. This is unique number for every card holder. Having more than one PAN is against the law and may attract a penalty up to Rs.10, 000.

Aadhaar number is a 12 digit random number, issued to the residents of India. It is provided by Unique Identification Authority of India (UIDAI) after obtaining demographic information and biometric information of the citizen. The first UID number was issued on 29 September 2010 to a resident of Nandurbar, Maharashtra. Unique Identification Authority of India (UIDAI) The Unique Identification Authority of India (UIDAI) is a statutory authority established under the provisions of the Aadhaaron 12 July 2016 by the Government, under the Ministry of Electronics and Information Technology (MeitY)

. The head office of the Authority is in New Delhi.Dr. Ajay Bhushan Pandey is the Chief Executive Officer of UIDAI.

Legal Entity Identifier

A Legal Entity Identifier (or LEI) is a 20-character identifier that identifies distinct legal entities that engage in financial transactions. It is defined by ISO 17442.The Legal Entity Identifier (LEI) code is conceived as a key measure to improve the quality and accuracy of financial data systems for better risk management post the Global Financial Crisis

LEI system for all borrowers of banks having total fund based and non-fund based exposure of Rs. 5 crore and above . Accordingly, it has been decided that the banks shall advise their existing large corporate borrowers having total exposures of Rs.50 crore and above to obtain LEI as per the schedule given in the Annex. Borrowers who do not obtain LEI as per the schedule are not to be granted renewal / enhancement of credit facilities.These directions are issued under Section 21 and Section 35(A) of the Banking Regulation Act, 1949.

An LEI consists of a 20-character alphanumeric string, with the first 4 characters identifying the Local Operating Unit (LOU) that issued the LEI. Characters 5 and 6 are reserved as '00'. Characters 7-18 are the unique alphanumeric string assigned to the organisation by the LOU. The final 2 characters are checksum digits.

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