> ## Documentation Index
> Fetch the complete documentation index at: https://help.kajabi.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Use a custom message for checkout email opt-in
> Customize the email opt-in message displayed on checkout pages to improve customer consent and compliance.
## Overview
Your checkout page includes an email opt-in checkbox that allows customers to subscribe to your marketing emails when completing a purchase. This is a single opt-in, not a Double Opt-In. Checking this box subscribes the customer directly without a confirmation email being sent. You can customize this message to better reflect your brand voice and clearly communicate what customers are signing up for.
Customizing this message helps you build trust with customers by being transparent about how their email will be used, while also ensuring compliance with email marketing regulations.
## Customize the email opt-in message
1. From the Dashboard, click **Settings.**
2. Click **Checkout Settings**.
3. Locate the **Email Opt-in Message** field.
4. Enter your custom message in the text field.
5. Click **Save** to apply your changes.
**Warning:**
Privacy laws such as GDPR, CAN-SPAM, and CASL require explicit consent before sending marketing emails. Make sure your opt-in message clearly states that customers are agreeing to receive marketing communications. Failing to obtain proper consent can result in legal penalties and damage to your sender reputation.
Note that some countries, such as Germany, require Double Opt-In for marketing email subscriptions regardless of purchase. The checkout opt-in checkbox is a single opt-in only. If your business operates in a country with Double Opt-In requirements, consult a legal professional to ensure compliance. [Learn about Double Opt-In in Kajabi](https://help.kajabi.com/articles/contacts/manage-your-contacts/what-is-the-difference-between-a-customer-contact-and-a-subscriber).
## Best practices for email opt-in messages
* **Be specific** about what subscribers will receive, such as newsletters, promotions, or course updates. Vague language like "marketing emails" may reduce trust and opt-in rates.
* **Keep it concise** so customers understand the value without reading a lengthy paragraph. One to two sentences is usually enough.
* **Mention frequency** if you send emails regularly such as weekly tips or monthly updates. This sets expectations and reduces unsubscribes.
* **Use plain language** that matches your brand voice. Avoid legal jargon that may confuse or discourage customers from opting in
## FAQs
### Where does the email opt-in checkbox appear?
The checkbox displays on your checkout page, typically below the email address field. Customers see it when completing any Offer purchase.
### Will existing customers see the updated message?
Yes. Your updated message will appear on all new checkouts after you save your changes. Customers who have already completed a purchase will not see the updated message retroactively.
### What happens if a customer doesn't check the opt-in box?
Customers who don't check the box will still complete their purchase but won't be subscribed to your marketing email list. They will still receive transactional emails related to their purchase.
### Is the checkout email opt-in a Double Opt-In?
No. The checkout email opt-in checkbox is a single opt-in. When a customer checks the box, they are subscribed to your marketing emails directly without receiving a confirmation email. Some countries require Double Opt-In for marketing subscriptions regardless of purchase. If your business operates in one of these regions, consult a legal professional to ensure your opt-in process meets local requirements. [Learn how to set up Double Opt-In in Kajabi](https://help.kajabi.com/articles/contacts/manage-your-contacts/what-is-the-difference-between-a-customer-contact-and-a-subscriber).