DIN is short form of Director Identification Number, it is a number you need when an individual wants to become a director or already is a director of any company. It consists of 8 unique digits. It is issued by the Ministry of Corporate affairs (MCA), Government of India. Once the DIN has been allotted to the individual it will be valid for the Lifetime. This concept was first introduced in the year 2006.
By using DIN on the MCA portal, you can check the details of that Director like, in how many companies he is working etc. This number holds the details of the Director in the database.
“Director Identification Number” also includes Designated Partnership Identification Number (DPIN) issued under section 7 of Limited Liability Partnership Act,2008. So, even if you are a partner in any LLP, you will need DIN.