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This documentation is not using the current rendering mechanism and will be deleted by December 31st, 2020. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.

Tutorial

Use invisible recaptcha in EXT:form forms

To use the invisible captcha in the form you need to add the advanced element “reCAPTCHA”. This field has the validation automatically added. Next step is to open the “Settings” of the form and need to check the “Use invisible recaptcha”.

At last you need to add the TypoScript constants. One is to enable to the inclusion of the invisible recaptcha callback and the other is to tell the callback which id the form to handle has.

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plugin.tx\_recaptcha {
    include\_invisible\_recaptcha\_callback = 1
    invisible\_recaptcha\_formname = captchaForm-4
}