Captcha 

It is possible to activate the display of a captcha image and a text field where the user must enter the text displayed on the image. Extension sr_freecap or captcha must have been installed. The captcha_response field should not be specified as a required field. Set in TS Constants:

formFields := addToList(captcha_response)

or, using the TS Constant Editor, add captcha_response to the list of fields

Set also in TS Setup:

plugin.tx_agency {
  create.evalValues.captcha_response = freecap
}

or set in TS Setup:

plugin.tx_agency {
    create.evalValues.captcha_response = captcha
}