For those unfamiliar, Aadhaar is a universal identity card (or not). It is a biometric-based 12-digit unique number, more or less covers the entire Indian population.
Aadhaar translates to foundation or root. The Aadhaar number is essential for maintaining access to a bank account or a Demat account, mobile connection, and more. The number follows you like a shadow till death. Heck, the number won’t even leave you after death. You would need it at cremation center, then for the death certificate and for transferring your estate as well.