Ninja Forms is a WordPress Form builder that helps you add front-end forms to your WordPress site. OTP Verification Plugin verifies Phone/Email of users by sending OTP Verification code before submitting Ninja Forms. The purpose of this guide is to help you setup OTP Verification for your Ninja Forms ( Below version 3.0 ).
Yes, it is possible to customize both the Email and SMS OTP Message that goes out to your users. The steps vary depending on the plan you are on.