Who This Is For / When to Use
This article is for users who need to verify contact consent before sending emails or SMS, including teams operating in GDPR-regulated regions or those wanting to reduce spam, bots, and invalid contact data.
What a Double Opt-In System Does
A double opt-in system requires a contact to confirm their intent after an initial opt-in before receiving further communications. This confirmation typically happens through a link click and helps verify consent, validate contact information, and improve deliverability.
How a Double Opt-In Workflow Works
A double opt-in workflow sends a confirmation message after an initial opt-in and only allows future communications once the contact confirms. Until confirmation occurs, the contact is excluded from nurture campaigns, automations, or broadcasts.
Step 1: Trigger the Initial Opt-In Confirmation
Use an automation trigger to send a confirmation request immediately after a contact opts in.
Common triggers include:
Form Submitted
Survey Completed
Funnel Step Submitted
What to do:
Create a workflow or campaign triggered by the initial opt-in action.
Add an email, SMS, or both asking the contact to confirm their opt-in.
Clearly explain why confirmation is required.
Step 2: Add a Confirmation Trigger Link
The confirmation message must include a trigger link that the contact clicks to confirm consent.
What to do:
Create a Trigger Link (for example: “Confirm Opt-In”).
Insert the Trigger Link into the confirmation email or SMS.
Save and publish the message.
This link is the confirmation point that enables the rest of your automations.
Step 3: Trigger Actions After Confirmation
Once the confirmation trigger link is clicked, the workflow can continue with additional actions.
Common post-confirmation actions include:
Adding confirmation tags
Enrolling the contact in nurture campaigns
Starting additional workflows
Updating pipelines or stages
Only contacts who click the confirmation link should reach these steps.
Best Practices for Double Opt-In Workflows
Use clear language explaining why confirmation is required.
Keep confirmation emails short and action-focused.
Apply a “Confirmed Opt-In” tag for tracking and segmentation.
Exclude unconfirmed contacts from marketing workflows.
Test the entire flow before enabling it for live traffic.
Common Issues and Fixes
Confirmation link not triggering actions
Ensure the trigger link used in the message exactly matches the trigger configured in the workflow.
Contacts receiving emails without confirming
Check that nurture campaigns and broadcasts exclude unconfirmed contacts.
Low confirmation rates
Simplify the confirmation message and ensure the call-to-action link is clearly visible.
Frequently Asked Questions
What is a double opt-in system?
A double opt-in system requires contacts to confirm their consent after an initial opt-in before receiving messages.
Is double opt-in required by law?
In regions like the EU, double opt-in is required under GDPR. In other regions, it is optional but recommended.
Can double opt-in be used for SMS and email?
Yes. Confirmation can be requested through email, SMS, or both.
What happens after a contact confirms?
Once the confirmation link is clicked, the workflow triggers additional actions such as campaigns, tags, or automations.
Does double opt-in reduce spam and fake leads?
Yes. Because confirmation requires a real interaction, it significantly reduces bots and invalid addresses.