For single-holder accounts or folios opened after implementation, nomination will be mandatory unless the investor submits an opt-out declaration, while nomination remains optional for jointly held accounts. Investors may nominate up to three persons and can submit, change, or cancel nominations any number of times. Nomination can be made online through prescribed authentication methods, including digital signatures, Aadhaar-based e-sign, or two-factor authentication, or offline through a signed form. Only the nominee’s name and relationship are mandatory details, while contact information and other particulars are optional.