This method, though easy, comes with limitations. It allows you to invest only up to ₹50,000 per fund house each year. To invest more, you need to complete physical KYC (many portals arrange for pick-ups of forms by courier) or a biometric KYC. You need to verify your bank account and register your bank mandate. Different bank accounts and portals have different systems. For instance, Clearfunds.com and FundsIndia.com instantly deposit ₹1 in your bank account to verify your ownership of the same. You can register your bank mandate using Aadhaar-based online verification process as used for KYC.