General Settings | Spam Control - Zoho Forms

CAPTCHA

When you share a form publicly, there is a possibility of receiving spam entries in your form. To prevent spam entries, Zoho Forms provides an option to include a CAPTCHA in your form. CAPTCHA stands for Completely Automated Public Turing Test to Distinguish Between Computers and Humans . It's a common way to ensure that your form interacts with a human rather than a computer bot. Enabling captcha validation on your form can help you validate respondents by challenging them to enter a response before they submit a form and keeping the irrelevant data at bay. You can use the default CAPTCHA available in Zoho Forms or integrate with Google's reCAPTCHA services to protect your forms online.
captcha

You can select a CAPTCHA version from the following options:

Zoho Forms CAPTCHA   

This is a combination of alphanumeric characters used as a security check to ensure only human users can pass through.

  1. Go to Settings > Spam Control > CAPTCHA.

    Select CAPTCHA version


  2. Under Select a CAPTCHA version, select Zoho Forms CAPTCHA.
  3. Enter a CAPTCHA Label.
  4. Enter a CAPTCHA Description and click Save

    Zoho Forms CAPTCHA configuration

Google reCAPTCHA v2   

To prevent spam and bot entries in your form, you can integrate with Google's reCAPTCHA services. To set this up for your form, you will require a set of API key pair. You can choose from the following Google ReCAPTCHA options:

Notes
Note : You will require separate and unique API key pairs for both the above options.

reCAPTCHA API Keys   

To obtain a set of API key pair consisting of a Site Key and a Secret Key from Google,

  1. Login to your Google account.
  2. Register your site details.
  3. Enter a Label to identify the site.
  4. Choose reCAPTCHA v2 under ReCAPTCHA type.
  5. Under Domains, add the Zoho Forms domains and the custom domain you are using based on your DC as given in the below table.

    Domains to be included

    Zoho Forms Domains

    Custom Domain (Example)

    EU

    forms.zoho.eu

    forms.zohopublic.eu

    forms.zylker.eu

    AU

    forms.zoho.com.au

    forms.zohopublic.com.au

    forms.zylker.com.au

    US

    forms.zoho.com

    forms.zohopublic.com

    forms.zylker.com

    IN

    forms.zoho.in

    forms.zohopublic.in

    forms.zylker.in

    CA

    forms.zohocloud.ca

    forms.zohopublic.ca

    forms.zylker.ca

    JP

    forms.zoho.jp

    forms.zohopublic.jp

    forms.zylker.jp

    CN

    forms.zoho.com.cn

    formscn.zohopublic.com.cn

    forms.zylker.com.cn



    Obtain Google  reCAPTCHA API keys

    Accept the reCAPTCHA Terms of Service and click Submit.

reCAPTCHA v2 ("I'm not a robot" checkbox)                                 

Including the reCAPTCHA v2 "I'm not a robot" checkbox will prompt the respondent to select a checkbox to validate that the respondent is not a robot.
To use this CAPTCHA version,
  1. Navigate to Settings Spam Control > CAPTCHA.
  2. Under Select a CAPTCHA version, select  Google reCAPTCHA v2 ("I'm not a robot" checkbox).
  3. Enter the API Key pair provided by Google after registering your website and domain.
  4. Select the required Language and Theme for your reCAPTCHA v2. The options supported by Google will be listed here.

reCAPTCHA v2 (Invisible reCAPTCHA badge)                   


Unlike reCAPTCHA v2 checkbox, the Invisible reCAPTCHA badge does not require the user to select a checkbox. Instead, it validates respondents in the background when they click Submit


To use this CAPTCHA version,

  1. Navigate to  Settings Spam Control > CAPTCHA.
  2. Under Select a CAPTCHA version , select Google reCAPTCHA v2 (Invisible reCAPTCHA badge).
  3. Enter the API Key pair provided by Google after registering your website and domain.
  4. Select the required Language and Theme for your reCAPTCHA v2. The options supported by Google will be listed here.


Google ReCAPTCHA

Google reCAPTCHA v3

reCAPTCHA v3 provides a score based system to access interaction with your form. It operates silently in the background, assigning a score ranging from 0.0 (likely a bot) to 1.0 (likely a human). You can assign a threshold score that aligns with your specific risk tolerance. Based on whether a user's generated score falls above or below the predefined threshold, you can configure necessary actions.


To use this CAPTCHA version,
  1. Navigate to Settings > Spam Control > CAPTCHA.
  2. Under Select a CAPTCHA version, choose Google reCAPTCHA v3.
  3. Enter the Site Key and Secret Key provided by Google after registering your website and domain.
  4. Select the required Language for your reCAPTCHA v3. The options supported by Google will be listed here.
  5. Select the reCAPTCHA Score to set a threshold score for your form/site based on traffic.
  6. Under Action for Low reCAPCHA Score, select the action you want to perform if the score falls below the set threshold value. You can either:
    1. Block Submission and provide a message for the block.
    2. Show Zoho Forms CAPTCHA for further verification. Configuring it by providing a CAPTCHA Label and CAPTCHA Description.
Notes
Note: 
When creating a key in console.cloud.google.com, you can get different reCAPTCHA types based on your settings. Providing only the Required settings will generate a reCAPTCHA v3 key. To get a reCAPTCHA v2 key, you must provide Additional settings. Enabling "Will you use challenges?" and selecting the Checkbox challenge will give you the "I'm not a robot" checkbox key, while selecting the Policy-based challenge will give you an Invisible reCAPTCHA badge key.
Refer to the FAQs on CAPTCHA.

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