> ## Documentation Index
> Fetch the complete documentation index at: https://docs.partnero.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Double opt-in for newsletter referral programs
You can set up subscription confirmation (or double opt-in) emails for your newsletter referral programs.
This means that when someone signs up for your newsletter through a referral link, they will receive a confirmation email to confirm their subscription. This helps to prevent fraudulent sign-ups and ensures compliance.
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### How to enable double opt-in emails
1. Open your newsletter referral program.
2. Go to **Settings** and scroll down to the **Reward** section. Toggle **Enable double opt-in**:
Once enabled, you will also have the option to enter a **Redirect URL**. This is where your subscribers will land after confirming the subscription. If left blank, the subscribers will be redirected back to the subscription page with a success message.
3. Click **Update.**
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### Design the double opt-in email
To design the email:
1. Click on **Emails** under **Features.**
2. Switch to the **Emails** tab and click the cog icon next to the **Double opt-in email**: 
3. Click **Edit content** to view and edit the email:
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4. Make any changes you wish and click **Save**.
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