Hi,
In this case, the CAPTCHA control displays the
securitycode.lblsecuritycode security code as shown here:
<data name="securitycode.lblsecuritycode" xml:space="preserve">
<value>Enter security code:</value>
</data>
You can modify it in the
~/CMSResources/CMS.resx file.
If you want to completely disable the text, you can do so in the
~\CMSFormControls\Captcha\SimpleCaptcha.ascx.cs file in the
Page_Load method by disabling the
LocalizedLabel control with the ID
lblSecurityCode.
Best regards,
Michal Legen