## Zoho Billing - Product, solutions, integrations, support, and resources Index Access the complete documentation index at: https://www.zoho.com/in/billing/llms.txt Use this file to discover all available documentation pages before proceeding. [Back](./) # Will my customers prompted for OTP while performing auto-recurring transactions? For the first transaction, the user will go through a two factor authentication process (OTP/ Mastercard Secure password/ Verified by Visa Password) and after that they will have to consent that subsequent payments can go through without an OTP. Users will be notified about the payment via SMS.