Double Opt-In Email Verification with Google Sheets

This n8n workflow automates a secure double opt-in process for user email verification, integrated with Google Sheets for data storage. It begins with a user submitting a sign-up form, where a unique verification code is generated and emailed to the user. The user then verifies their email by submitting the code through a verification form. The workflow checks the code’s validity, recording successful verifications in Google Sheets. If the code is incorrect, the user is prompted to retry, ensuring only verified users proceed. Practical for mailing lists, user registrations, or secure sign-ups, this workflow enhances security and engagement.