We strongly recommend using a CAPTCHA confirmation in your forms to prevent spambots from adding fake data to your lists. With Brevo, you can choose between Google reCAPTCHA or Cloudflare Turnstile CAPTCHA.
🛠️ Step 1: Create your CAPTCHA
- Go to https://www.google.com/recaptcha/admin/create and log into your Google account.
- Add a Label. This name is for internal use only to help you identify your reCAPTCHA on your Google account.
- Select reCAPTCHA v2.
❗️ ImportantreCAPTCHA v3 is not supported in Brevo. - Choose the type of reCAPTCHA you need.
- Fill in the Domains field according to how you will share your form:
- If you want to share your form using Quick Share or Iframe: add the domain sibforms.com. It is the domain Brevo uses to host the form.
- If you want to integrate your form with HTML or Simple HTML: add the domain of the website where you will display the form. For instance, if you want to add the form on http://www.thegreenyoga.com, add thegreenyoga.com in this field.
💡 Good to knowIf you're not sure how you will share the form, you can add both of the above domains.
- Accept the reCAPTCHA Terms of Service.
- Click Submit.
Your reCAPTCHA is created. You will now see a page displaying the Site Key and Secret Key. You will use these keys in the following step to configure reCAPTCHA within your form.
- Log into your Cloudflare account.
- Select the Turnstile menu.
- Click Add site.
- Enter your Site name. This name is for internal use only to help you identify widgets on your Cloudflare account.
- Fill in the Domains field according to how you will share your form:
- If you want to share your form using Quick Share or Iframe: add the domain sibforms.com. It is the domain Brevo uses to host the form.
- If you want to integrate your form with HTML or Simple HTML: add the domain of the website where you will display the form. For instance, if you want to add the form on http://www.thegreenyoga.com, add thegreenyoga.com in this field.
💡 Good to knowIf you're not sure how you will share the form, you can add both of the above domains.
- Under Widget Type, choose how Cloudflare should process captcha requests on your forms:
- Managed: This option allows Cloudflare to decide whether to show an interactive challenge or automatically verify the user based on their browser data and interaction.
- Non-interactive: This option will show the CAPTCHA widget on your form. However, it doesn’t require user interaction. Cloudflare will automatically run the challenge and verify the user.
- Invisible: This option runs in the background and requires no interaction from the user.
- Click Create to add your site.
Your CAPTCHA is created. You will now see a page displaying the Site Key and Secret Key. You will use these keys in the following step to configure a CAPTCHA within your form.
💡 Good to know
The site key and secret key can be used across multiple forms. 📄 Step 2: Add the CAPTCHA to your Brevo form
- Go to Contacts > Forms.
- Create a new form or open a form you already created.
- At the Design step, drag and drop the Captcha block in your form.
- In the Captcha Type dropdown, select Google or Cloudflare.
- Copy and paste the Site Key and Secret Key from the previous procedure in their respective fields.
- Select Label to add a label above your CAPTCHA.
- Select Help Text to add a caption below your CAPTCHA.
- (Optional) If you are using a Google reCAPTCHA and have chosen the "Invisible reCAPTCHA badge" option when creating it, select Invisible Captcha.
Troubleshooting
You may receive these error messages once you share the form :
❌ Invalid domain for site key
Check the domain field in Google or Cloudflare:
- If you want to share your form using Quick Share or Iframe: add the domain sibforms.com. It is the domain Brevo uses to host the form.
- If you want to integrate your form with HTML or Simple HTML: add the domain of the website where you will display the form. For instance, if you want to add the form on http://www.thegreenyoga.com, add thegreenyoga.com in this field.
💡 Good to knowIf you're not sure how you will share the form, you can add both of the above domains.
❌ Invalid key type
If you select reCAPTCHA v3 in Google, you may receive this error message on your form. Only reCAPTCHA v2 is supported.
⏩ What's next?
- Create a subscription form - Introduction to subscription forms
- Create a subscription form - Part 1: Set up your subscription form
- Create a subscription form - Part 2: Design your subscription form
- Create a subscription form - Part 3: Select your list
- Create a subscription form - Part 4: Add a double opt-in confirmation to your form
- Create a subscription form - Part 5: Share your form
- Create a subscription form - FAQ
🤔 Have a question?
If you have a question, feel free to contact our support team by creating a ticket from your account. If you don't have an account yet, you can contact us here.